Logic Apps Designer does not start

### Severity

P1 - Critical (Blocking production)

### Describe the Bug with repro steps

I just prepared a Logic App Developer environment for one of our customers for demo purposes. I created a new Logic App Workspace and a Workflow. When I try to open the designer I get the error-log you will find below. I tried it on two brand new machines. X64 and ARM64. I just installed Visual Studio Code and the Logic Apps Standard Extension. On both machines/Architectures I get the same result:

Please see the error-logs below:
C:\Dev\LogicApps\Demo> C:\Users\sebas\.azurelogicapps\dependencies\FuncCoreTools\func host start --port 8000 --verbose
FUNCTIONS_INPROC_NET8_ENABLED app setting enabled in local.settings.json
Selected inproc8 host.
Starting child process for inproc8 model host.
C:\Users\sebas\.azurelogicapps\dependencies\FuncCoreTools\in-proc8\func.exe present
Started child process with ID: 4436
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Azure Functions Core Tools
Core Tools Version: 4.1.0+9a53409b640bbb39ef49467f000f46c5d81d4bbf (64-bit)
Function Runtime Version: 4.40.100.25262
[2025-08-06T17:42:58.124Z] Csproj not found in C:\Dev\LogicApps\Demo directory tree. Skipping user secrets file configuration.
[2025-08-06T17:42:58.319Z] Building host: version spec: , startup suppressed: 'False', configuration suppressed: 'False', startup operation id: 'd781ce65-8627-4026-9dbb-e0ca0ef9dcbb'
[2025-08-06T17:42:58.323Z] Reading host configuration file 'C:\Dev\LogicApps\Demo\host.json'
[2025-08-06T17:42:58.324Z] Host configuration file read:
[2025-08-06T17:42:58.332Z] {
[2025-08-06T17:42:58.333Z] "version": "2.0",
[2025-08-06T17:42:58.334Z] "logging": {
[2025-08-06T17:42:58.334Z] "applicationInsights": {
[2025-08-06T17:42:58.335Z] "samplingSettings": {
[2025-08-06T17:42:58.335Z] "isEnabled": true,
[2025-08-06T17:42:58.337Z] "excludedTypes": "Request"
[2025-08-06T17:42:58.337Z] }
[2025-08-06T17:42:58.338Z] }
[2025-08-06T17:42:58.338Z] },
[2025-08-06T17:42:58.338Z] "extensionBundle": {
[2025-08-06T17:42:58.338Z] "id": "Microsoft.Azure.Functions.ExtensionBundle.Workflows",
[2025-08-06T17:42:58.339Z] "version": "[1.*, 2.0.0)"
[2025-08-06T17:42:58.339Z] }
[2025-08-06T17:42:58.339Z] }
[2025-08-06T17:42:58.368Z] Found multi-language runtime environment. Starting WorkerConfig for language: java
[2025-08-06T17:42:58.370Z] Found multi-language runtime environment. Starting WorkerConfig for language: node
[2025-08-06T17:42:58.377Z] Found multi-language runtime environment. Starting WorkerConfig for language: powershell
[2025-08-06T17:42:58.379Z] Looking for extension bundle Microsoft.Azure.Functions.ExtensionBundle.Workflows at C:\Users\sebas\.azure-functions-core-tools\Functions\ExtensionBundles\Microsoft.Azure.Functions.ExtensionBundle.Workflows
[2025-08-06T17:42:58.379Z] Applying platform release channel configuration LATEST. Bundle version 1.131.9 will be used
[2025-08-06T17:42:58.380Z] Found a matching extension bundle at C:\Users\sebas\.azure-functions-core-tools\Functions\ExtensionBundles\Microsoft.Azure.Functions.ExtensionBundle.Workflows\1.131.9
[2025-08-06T17:42:58.387Z] Loading functions metadata
[2025-08-06T17:42:58.389Z] Reading functions metadata (Host)
[2025-08-06T17:42:58.392Z] 0 functions found (Host)
[2025-08-06T17:42:58.396Z] 0 functions loaded
[2025-08-06T17:42:58.397Z] Looking for extension bundle Microsoft.Azure.Functions.ExtensionBundle.Workflows at C:\Users\sebas\.azure-functions-core-tools\Functions\ExtensionBundles\Microsoft.Azure.Functions.ExtensionBundle.Workflows
[2025-08-06T17:42:58.398Z] Applying platform release channel configuration LATEST. Bundle version 1.131.9 will be used
[2025-08-06T17:42:58.399Z] Found a matching extension bundle at C:\Users\sebas\.azure-functions-core-tools\Functions\ExtensionBundles\Microsoft.Azure.Functions.ExtensionBundle.Workflows\1.131.9
[2025-08-06T17:42:58.399Z] Fetching information on versions of extension bundle Microsoft.Azure.Functions.ExtensionBundle.Workflows available on https://cdn.functions.azure.com/public/ExtensionBundles/Microsoft.Azure.Functions.ExtensionBundle.Workflows/index.json
[2025-08-06T17:42:58.566Z] Applying platform release channel configuration LATEST. Bundle version 1.131.9 will be used
[2025-08-06T17:42:58.569Z] Skipping bundle download since it already exists at path C:\Users\sebas\.azure-functions-core-tools\Functions\ExtensionBundles\Microsoft.Azure.Functions.ExtensionBundle.Workflows\1.131.9
[2025-08-06T17:42:58.597Z] Loading extension bundle from C:\Users\sebas\.azure-functions-core-tools\Functions\ExtensionBundles\Microsoft.Azure.Functions.ExtensionBundle.Workflows\1.131.9\bin
[2025-08-06T17:42:58.598Z] Script Startup resetting load context with base path: 'C:\Users\sebas\.azure-functions-core-tools\Functions\ExtensionBundles\Microsoft.Azure.Functions.ExtensionBundle.Workflows\1.131.9\bin'.
[2025-08-06T17:42:58.603Z] Loading startup extension 'CosmosDB'
[2025-08-06T17:42:58.652Z] Loaded extension 'CosmosDB' (4.6.1.0)
[2025-08-06T17:42:58.660Z] Loading startup extension 'EventGrid'
[2025-08-06T17:42:58.661Z] Loaded extension 'EventGrid' (3.2.0.0)
[2025-08-06T17:42:58.662Z] Loading startup extension 'EventHubs'
[2025-08-06T17:42:58.663Z] Loaded extension 'EventHubs' (6.3.5.0)
[2025-08-06T17:42:58.664Z] Loading startup extension 'Kafka'
[2025-08-06T17:42:58.665Z] Loaded extension 'Kafka' (4.0.0.0)
[2025-08-06T17:42:58.666Z] Loading startup extension 'RabbitMQ'
[2025-08-06T17:42:58.666Z] Loaded extension 'RabbitMQ' (2.0.3.0)
[2025-08-06T17:42:58.667Z] Loading startup extension 'ServiceBus'
[2025-08-06T17:42:58.668Z] Loaded extension 'ServiceBus' (5.14.0.0)
[2025-08-06T17:42:58.668Z] Loading startup extension 'SqlBinding'
[2025-08-06T17:42:58.669Z] Loaded extension 'SqlBinding' (3.1.284.0)
[2025-08-06T17:42:58.669Z] Loading startup extension 'AzureStorageBlobs'
[2025-08-06T17:42:58.670Z] Loaded extension 'AzureStorageBlobs' (5.2.1.0)
[2025-08-06T17:42:58.670Z] Loading startup extension 'AzureStorageQueues'
[2025-08-06T17:42:58.671Z] Loaded extension 'AzureStorageQueues' (5.1.3.0)
[2025-08-06T17:42:58.671Z] Loading startup extension 'ScriptingExtension'
[2025-08-06T17:42:58.672Z] Loaded extension 'ScriptingExtension' (1.131.9.0)
[2025-08-06T17:42:58.672Z] Loading startup extension 'ACASessionServiceProvider'
[2025-08-06T17:42:58.673Z] Loaded extension 'ACASessionServiceProvider' (1.131.9.0)
[2025-08-06T17:42:58.673Z] Loading startup extension 'AutomationServiceProvider'
[2025-08-06T17:42:58.674Z] Loaded extension 'AutomationServiceProvider' (0.0.0.0)
[2025-08-06T17:42:58.674Z] Loading startup extension 'AzureAISearchProvider'
[2025-08-06T17:42:58.674Z] Loaded extension 'AzureAISearchProvider' (1.131.9.0)
[2025-08-06T17:42:58.675Z] Loading startup extension 'AzureBlobServiceProvider'
[2025-08-06T17:42:58.676Z] Loaded extension 'AzureBlobServiceProvider' (0.0.0.0)
[2025-08-06T17:42:58.676Z] Loading startup extension 'AzureFileServiceProvider'
[2025-08-06T17:42:58.677Z] Loaded extension 'AzureFileServiceProvider' (0.0.0.0)
[2025-08-06T17:42:58.677Z] Loading startup extension 'QueueServiceProvider'
[2025-08-06T17:42:58.678Z] Loaded extension 'QueueServiceProvider' (1.131.9.0)
[2025-08-06T17:42:58.678Z] Loading startup extension 'AzureTablesServiceProvider'
[2025-08-06T17:42:58.678Z] Loaded extension 'AzureTablesServiceProvider' (1.131.9.0)
[2025-08-06T17:42:58.679Z] Loading startup extension 'CicsProgramCallServiceProvider'
[2025-08-06T17:42:58.679Z] Loaded extension 'CicsProgramCallServiceProvider' (1.131.9.0)
[2025-08-06T17:42:58.679Z] Loading startup extension 'ConfluentKafkaServiceProvider'
[2025-08-06T17:42:58.680Z] Loaded extension 'ConfluentKafkaServiceProvider' (1.131.9.0)
[2025-08-06T17:42:58.680Z] Loading startup extension 'CosmosDBServiceProvider'
[2025-08-06T17:42:58.681Z] Loaded extension 'CosmosDBServiceProvider' (1.131.9.0)
[2025-08-06T17:42:58.681Z] Loading startup extension 'DB2ServiceProvider'
[2025-08-06T17:42:58.682Z] Loaded extension 'DB2ServiceProvider' (1.131.9.0)
[2025-08-06T17:42:58.682Z] Loading startup extension 'DocumentIntelligenceServiceProvider'
[2025-08-06T17:42:58.683Z] Loaded extension 'DocumentIntelligenceServiceProvider' (1.131.9.0)
[2025-08-06T17:42:58.683Z] Loading startup extension 'EventGridPublisherServiceProvider'
[2025-08-06T17:42:58.684Z] Loaded extension 'EventGridPublisherServiceProvider' (0.0.0.0)
[2025-08-06T17:42:58.684Z] Loading startup extension 'EventHubsServiceProvider'
[2025-08-06T17:42:58.685Z] Loaded extension 'EventHubsServiceProvider' (1.131.9.0)
[2025-08-06T17:42:58.685Z] Loading startup extension 'FileSystemServiceProvider'
[2025-08-06T17:42:58.686Z] Loaded extension 'FileSystemServiceProvider' (0.0.0.0)
[2025-08-06T17:42:58.686Z] Loading startup extension 'FtpServiceProvider'
[2025-08-06T17:42:58.687Z] Loaded extension 'FtpServiceProvider' (0.0.0.0)
[2025-08-06T17:42:58.687Z] Loading startup extension 'HostFileServiceProvider'
[2025-08-06T17:42:58.688Z] Loaded extension 'HostFileServiceProvider' (1.131.9.0)
[2025-08-06T17:42:58.688Z] Loading startup extension 'IbmIProgramCallServiceProvider'
[2025-08-06T17:42:58.689Z] Loaded extension 'IbmIProgramCallServiceProvider' (1.131.9.0)
[2025-08-06T17:42:58.689Z] Loading startup extension 'ImsProgramCallServiceProvider'
[2025-08-06T17:42:58.690Z] Loaded extension 'ImsProgramCallServiceProvider' (1.131.9.0)
[2025-08-06T17:42:58.691Z] Loading startup extension 'JdbcServiceProvider'
[2025-08-06T17:42:58.691Z] Loaded extension 'JdbcServiceProvider' (0.0.0.0)
[2025-08-06T17:42:58.692Z] Loading startup extension 'KeyVaultServiceProvider'
[2025-08-06T17:42:58.692Z] Loaded extension 'KeyVaultServiceProvider' (0.0.0.0)
[2025-08-06T17:42:58.693Z] Loading startup extension 'MqServiceProvider'
[2025-08-06T17:42:58.694Z] Loaded extension 'MqServiceProvider' (1.131.9.0)
[2025-08-06T17:42:58.694Z] Loading startup extension 'OpenAiServiceProvider'
[2025-08-06T17:42:58.695Z] Loaded extension 'OpenAiServiceProvider' (1.131.9.0)
[2025-08-06T17:42:58.695Z] Loading startup extension 'RabbitMQServiceProvider'
[2025-08-06T17:42:58.696Z] Loaded extension 'RabbitMQServiceProvider' (1.131.9.0)
[2025-08-06T17:42:58.696Z] Loading startup extension 'SapServiceProvider'
[2025-08-06T17:42:58.697Z] Loaded extension 'SapServiceProvider' (1.131.9.0)
[2025-08-06T17:42:58.697Z] Loading startup extension 'ServiceBusServiceProvider'
[2025-08-06T17:42:58.698Z] Loaded extension 'ServiceBusServiceProvider' (1.131.9.0)
[2025-08-06T17:42:58.699Z] Loading startup extension 'SftpServiceProvider'
[2025-08-06T17:42:58.699Z] Loaded extension 'SftpServiceProvider' (0.0.0.0)
[2025-08-06T17:42:58.700Z] Loading startup extension 'Si3270ServiceProvider'
[2025-08-06T17:42:58.700Z] Loaded extension 'Si3270ServiceProvider' (1.131.9.0)
[2025-08-06T17:42:58.701Z] Loading startup extension 'SmtpServiceProvider'
[2025-08-06T17:42:58.701Z] Loaded extension 'SmtpServiceProvider' (0.0.0.0)
[2025-08-06T17:42:58.702Z] Loading startup extension 'SqlServiceProvider'
[2025-08-06T17:42:58.702Z] Loaded extension 'SqlServiceProvider' (1.131.9.0)
[2025-08-06T17:42:58.703Z] Loading startup extension 'WorkflowExtension'
[2025-08-06T17:42:58.703Z] Loaded extension 'WorkflowExtension' (1.131.9.0)
[2025-08-06T17:42:58.713Z] Reading host configuration file 'C:\Dev\LogicApps\Demo\host.json'
[2025-08-06T17:42:58.714Z] Host configuration file read:
[2025-08-06T17:42:58.714Z] {
[2025-08-06T17:42:58.714Z] "version": "2.0",
[2025-08-06T17:42:58.715Z] "logging": {
[2025-08-06T17:42:58.715Z] "applicationInsights": {
[2025-08-06T17:42:58.715Z] "samplingSettings": {
[2025-08-06T17:42:58.716Z] "isEnabled": true,
[2025-08-06T17:42:58.716Z] "excludedTypes": "Request"
[2025-08-06T17:42:58.716Z] }
[2025-08-06T17:42:58.717Z] }
[2025-08-06T17:42:58.717Z] },
[2025-08-06T17:42:58.717Z] "extensionBundle": {
[2025-08-06T17:42:58.718Z] "id": "Microsoft.Azure.Functions.ExtensionBundle.Workflows",
[2025-08-06T17:42:58.718Z] "version": "[1.*, 2.0.0)"
[2025-08-06T17:42:58.718Z] }
[2025-08-06T17:42:58.719Z] }
[2025-08-06T17:42:58.762Z] Error configuring services in an external startup class.
[2025-08-06T17:42:58.763Z] Error configuring services in an external startup class. System.Private.CoreLib: An attempt was made to load a program with an incorrect format. (0x8007000B).
[2025-08-06T17:42:58.848Z] A host error has occurred during startup operation 'd781ce65-8627-4026-9dbb-e0ca0ef9dcbb'.
[2025-08-06T17:42:58.849Z] Microsoft.Azure.WebJobs.Script: Error configuring services in an external startup class. System.Private.CoreLib: An attempt was made to load a program with an incorrect format. (0x8007000B).
Value cannot be null. (Parameter 'provider')
[2025-08-06T17:42:58.856Z] Host startup operation has been canceled
[2025-08-06T17:42:58.857Z] Initialization cancellation requested by runtime.
[2025-08-06T17:42:58.859Z] Stopping host...
[2025-08-06T17:42:58.860Z] Host shutdown completed.

### What type of Logic App Is this happening in?

Standard (VSCode)

### Are you experiencing a regression?

_No response_

### Which operating system are you using?

Windows

### Did you refer to the TSG before filing this issue? https://aka.ms/lauxtsg

Yes

### Workflow JSON

```json

```

### Screenshots or Videos

_No response_

### Environment

- LA Extension: 5.30.9
- Extension Bundle: 1.131.9

### Additional context

_No response_