Azure Functions shows 1 function found but 0 loaded when deployed

Hello there,

I am getting the following error when I try to execute the function app in the portal.

Local time Type Details
11:17:56.524 Trace Severity level: Information, Message: Loading functions metadata
11:17:56.524 Trace Severity level: Information, Message: Reading functions metadata (Custom)
11:17:56.525 Trace Severity level: Information, Message: 1 functions found (Custom)
11:17:56.525 Trace Severity level: Information, Message: 0 functions loaded
11:17:56.546 Trace Severity level: Information, Message: Loading functions metadata
11:17:56.547 Trace Severity level: Information, Message: 0 functions loaded

My project structure is:
host.json
requirements.txt
func_app.py
ingestor
- timer_ingestor.py

func_app.py contains:
```
from ingestor.timer_ingestor import bp as tm_bp
import azure.functions as func

app = func.FunctionApp()

app.register_functions(tm_bp)
```
ingestor/timer_ingestor.py contains:
```
import azure.functions as func

bp = func.Blueprint()

@bp.timer_trigger(arg_name="req", schedule="0 0 12 * * *", run_on_startup=True, use_monitor=False)
async def ingest_data_from_cms(req: func.TimerRequest) -> None:
logging.info(f'Timer ingestion started')

db = get_client()
container = db.get_container_client('ingestionruns')

query = "SELECT TOP 1 * FROM c ORDER BY c._ts DESC"

last_run_details = container.query_items(
query=query, enable_cross_partition_query=True)
...............more logic.................
```
requirements.txt:
```
azure-functions==1.17.0
azure-cosmos==4.5.1
azure-storage-blob==12.19.0
azure-identity==1.15.0
azure-keyvault-secrets==4.7.0
numpy==1.26.2
openai==1.3.8
requests==2.31.0
nltk==3.8.1
pandas==2.1.4
azure.search.documents==11.4.0
```
Function app config:
`Host Status: {
"id": "",
"state": "Running",
"version": "4.28.4.4",
"versionDetails": "4.28.4+0c3b64d19c54864d1b021f5e1372d82df5befc1f",
"platformVersion": "101.0.7.608",
"instanceId": "",
"computerName": "",
"processUptime": 69567773,
"functionAppContentEditingState": "Unknown",
"extensionBundle": {
"id": "Microsoft.Azure.Functions.ExtensionBundle",
"version": "4.12.0"
}
}`
host.json contains:
```
{
"version": "2.0",
"logging": {
"applicationInsights": {
"samplingSettings": {
"isEnabled": true,
"excludedTypes": "Request"
}
}
},
"extensionBundle": {
"id": "Microsoft.Azure.Functions.ExtensionBundle",
"version": "[3.*, 4.0.0)"
},
"functionTimeout": "-1"
}
```

The Function app stack setting is:
Stack: Python
Python Version: Python 3.10

Few Application settings:
```
{
"name": "FUNCTIONS_EXTENSION_VERSION",
"value": "~4",
"slotSetting": false
},
{
"name": "FUNCTIONS_WORKER_RUNTIME",
"value": "python",
"slotSetting": false
},
{
"name": "PYTHON_ISOLATE_WORKER_DEPENDENCIES",
"value": "1",
"slotSetting": false
},
{
"name": "AzureWebJobsFeatureFlags",
"value": "EnableWorkerIndexing",
"slotSetting": false
}
```
When the function executed from local, the following are the terminal logs:
Starting JobHost
[2024-01-25T06:13:28.143Z] Starting Host (HostId=hmecl004839-555791399, InstanceId=2deef8c9-c2db-4e93-a5e2-bd087dde74af, Version=4.27.5.21554, ProcessId=27684, AppDomainId=1, InDebugMode=False, InDiagnosticMode=False, FunctionsExtensionVersion=(null))
[2024-01-25T06:13:28.150Z] Loading functions metadata
[2024-01-25T06:13:28.151Z] Worker indexing is enabled
[2024-01-25T06:13:28.151Z] Fetching metadata for workerRuntime: python
[2024-01-25T06:13:28.152Z] Reading functions metadata (Worker)
[2024-01-25T06:13:28.166Z] Reading functions metadata (Custom)
[2024-01-25T06:13:28.179Z] 1 functions found (Custom)
[2024-01-25T06:13:28.186Z] 1 functions loaded
[2024-01-25T06:13:28.188Z] FUNCTIONS_WORKER_RUNTIME value: 'python'
[2024-01-25T06:13:28.191Z] Adding Function descriptor provider for language python.
[2024-01-25T06:13:28.194Z] Creating function descriptors.
[2024-01-25T06:13:28.286Z] Function descriptors created.
[2024-01-25T06:13:28.295Z] Placeholder mode is enabled: False
[2024-01-25T06:13:28.297Z] Found initialized language worker channel for runtime: python workerId:54084d83-e3ce-4e03-99f7-69a3bdcc7160
[2024-01-25T06:13:28.299Z] Setting up FunctionInvocationBuffer for function: 'ingest_data_from_cms' with functionId: '5481280d-6255-59eb-a3e2-311ded01728d'
[2024-01-25T06:13:28.302Z] Sending FunctionLoadRequest for function: 'ingest_data_from_cms' with functionId: '5481280d-6255-59eb-a3e2-311ded01728d'
[2024-01-25T06:13:28.306Z] Generating 1 job function(s)
[2024-01-25T06:13:28.308Z] [channel] received 54084d83-e3ce-4e03-99f7-69a3bdcc7160: RpcLog
[2024-01-25T06:13:28.308Z] Worker process started and initialized.
[2024-01-25T06:13:28.310Z] Received WorkerLoadRequest, request ID b595aba1-2820-49c6-b270-ebc93289de6a, function_id: 5481280d-6255-59eb-a3e2-311ded01728d,function_name: ingest_data_from_cms,
[2024-01-25T06:13:28.310Z] [channel] received 54084d83-e3ce-4e03-99f7-69a3bdcc7160: RpcLog
[2024-01-25T06:13:28.312Z] [channel] received 54084d83-e3ce-4e03-99f7-69a3bdcc7160: FunctionLoadResponse
[2024-01-25T06:13:28.312Z] Successfully processed FunctionLoadRequest, request ID: b595aba1-2820-49c6-b270-ebc93289de6a, function ID: 5481280d-6255-59eb-a3e2-311ded01728d,function Name: ingest_data_from_cms,programming model: V1
[2024-01-25T06:13:28.314Z] Received FunctionLoadResponse for function: 'ingest_data_from_cms' with functionId: '5481280d-6255-59eb-a3e2-311ded01728d'.
[2024-01-25T06:13:28.392Z] Found the following functions:
[2024-01-25T06:13:28.394Z] Host.Functions.ingest_data_from_cms
[2024-01-25T06:13:28.394Z]
[2024-01-25T06:13:28.412Z] HttpOptions
[2024-01-25T06:13:28.412Z] {
[2024-01-25T06:13:28.414Z] "DynamicThrottlesEnabled": false,
[2024-01-25T06:13:28.414Z] Initializing function HTTP routes
[2024-01-25T06:13:28.414Z] "EnableChunkedRequestBinding": false,
[2024-01-25T06:13:28.415Z] No HTTP routes mapped
[2024-01-25T06:13:28.415Z] "MaxConcurrentRequests": -1,
[2024-01-25T06:13:28.416Z]
[2024-01-25T06:13:28.417Z] "MaxOutstandingRequests": -1,
[2024-01-25T06:13:28.418Z] "RoutePrefix": "api"
[2024-01-25T06:13:28.418Z] }
[2024-01-25T06:13:28.427Z] Host initialized (271ms)
[2024-01-25T06:13:28.429Z] Host state changed from Default to Initialized.

Functions:

ingest_data_from_cms: timerTrigger

....
How can we solve this issue?
I have referred the following link to rectify it "https://github.com/Azure/azure-functions-host/issues/9720" But still it didn't help.
but function app runs fine locally