az deployment sub create error 'Object of type is not JSON serializable'

[ainoelina]

az feedback auto-generates most of the information requested below, as of CLI version 2.0.62

Related command

deployment sub create --name {} --location {} --template-file {} --parameters {} {} --no-wait

Describe the bug
I have an Azure Functionapp that runs python code where I call az cli with above command. The function works locally, but when I run it in Functionapp, I get an error message saying 'Object of type JsonCTemplate is not JSON serializable'.

Result: Failure Exception: CLIError: Object of type JsonCTemplate is not JSON serializable Stack: File "/azure-functions-host/workers/python/3.8/LINUX/X64/azure_functions_worker/dispatcher.py", 
line 407, in _handle__invocation_request call_result = await self._loop.run_in_executor( File "/usr/local/lib/python3.8/concurrent/futures/thread.py",
line 57, in run result = self.fn(*self.args, **self.kwargs) File "/azure-functions-host/workers/python/3.8/LINUX/X64/azure_functions_worker/dispatcher.py", 
line 649, in _run_sync_func return ExtensionManager.get_sync_invocation_wrapper(context, File "/azure-functions-host/workers/python/3.8/LINUX/X64/azure_functions_worker/extension.py", 
line 215, in _raw_invocation_wrapper result = function(**args) File "/home/site/wwwroot/Post_StartBicep/__init__.py", 
line 36, in main data = start_bicep(location, params) File "/home/site/wwwroot/Post_StartBicep/__init__.py", line 13, in start_bicep response = az_cli(cliCommands) File "/home/site/wwwroot/shared_code/az_cli.py", 
line 14, in az_cli raise cli.result.error File "/home/site/wwwroot/.python_packages/lib/site-packages/knack/cli.py", 
line 231, in invoke cmd_result = self.invocation.execute(args) File "/home/site/wwwroot/.python_packages/lib/site-packages/azure/cli/core/commands/__init__.py", 
line 658, in execute raise ex File "/home/site/wwwroot/.python_packages/lib/site-packages/azure/cli/core/commands/__init__.py", 
line 721, in _run_jobs_serially results.append(self._run_job(expanded_arg, cmd_copy)) File "/home/site/wwwroot/.python_packages/lib/site-packages/azure/cli/core/commands/__init__.py", 
line 713, in _run_job return cmd_copy.exception_handler(ex) File "/home/site/wwwroot/.python_packages/lib/site-packages/azure/cli/core/commands/arm.py", 
line 114, in handle_template_based_exception raise CLIError(ex)

Expected behavior

My bicep template should create a resource group to Azure.

Environment summary
az cli called through python function to deploy resources using Bicep template.
Functionapp configuration:

• FUNCTIONS_EXTENSION_VERSION ~4
• FUNCTIONS_WORKER_RUNTIME python
• linuxFxVersion: 'Python|3.8'

[yonzhan]

ARM

[Seppohto]

I have exactly the same 'Object of type is not JSON serializable' issue. Nothing in my code changed from last week. But now when i try to deploy that same code it gives that error. I tried to deploy with bicep and template.json files and they both fail. I'm using az-cli-core
This is the function in function app that runs the cli commands.
from azure.cli.core import get_default_cli
import logging

def az_cli (cliCommands):
    cli = get_default_cli()
    for command in cliCommands:
        logging.info(command)
        cliCommand = command.split()
        logging.info(cliCommand)
        cli.invoke(cliCommand)
    if cli.result.result:
        return cli.result.result
    elif cli.result.error:
        raise cli.result.error
    return True

Any idea how to workaround this error? Maybe you updated some features around it? It's the most important part of my project.