Getting a 502 Server Error on Static Web App

I'm deploying a Next.js React app using Azure pipelines. The deployment is working just fine, but I can no longer access the site once it's done.

This has been working just fine for weeks up until yesterday. I'm now getting a 502 on page load.

Here is my pipeline YML. This is deploying just fine in Azure Devops:

```yml
# Starter pipeline
# Start with a minimal pipeline that you can customize to build and deploy your code.
# Add steps that build, run tests, deploy, and more:
# https://aka.ms/yaml

# Trigger builds on commits to branches
trigger:
- main
- dev

# Do not trigger builds on PRs
pr: none

variables:
${{ if eq(variables['Build.SourceBranchName'], 'main') }}:
api_url: $(NEXT_PUBLIC_API_URL_PROD)
app_env: 'production'
static_web_app_deploy_token: $(DEPLOYMENT_TOKEN_PROD)
${{ if eq(variables['Build.SourceBranchName'], 'dev') }}:
api_url: $(NEXT_PUBLIC_API_URL_PROD)
app_env: 'development'
static_web_app_deploy_token: $(DEPLOYMENT_TOKEN_DEV)

stages:
- stage: test
displayName: 'Lint and Test'
jobs:
- job: lint_test
displayName: 'Lint and Test'
pool:
vmImage: ubuntu-latest

steps:
- task: CmdLine@2
inputs:
script: |
yarn
yarn run lint
yarn run test

- stage: 'Deploy'
displayName: 'Deploy'
jobs:
- deployment: Deploy

environment: ${{ variables.app_env }}

strategy:
runOnce:
deploy:
steps:
- script: git config --global init.defaultBranch main
displayName: 'Setting git config default branch'

- checkout: self
submodules: true

- script: echo 'Deploying to ${{ variables.app_env }}'
displayName: 'Print deployment environment'

- task: AzureStaticWebApp@0
inputs:
app_location: '/'
output_location: '/packages/main-app/out'
azure_static_web_apps_api_token: ${{ variables.static_web_app_deploy_token }}
env:
NEXT_PUBLIC_ADMIN_API_URL: ${{ variables.api_url }}
NEXT_PUBLIC_APP_ENV: ${{ variables.app_env }}
NEXT_PUBLIC_AZURE_AD_CLIENT_ID: $(NEXT_PUBLIC_AZURE_AD_CLIENT_ID)
NEXT_PUBLIC_AZURE_AD_TENANT_ID: $(NEXT_PUBLIC_AZURE_AD_TENANT_ID)

```

**Expected behavior**
Should be able to access the static web app URL without any errors.

**Device info (if applicable):**
N/A

**Additional context**
Add any other context about the problem here.