Function App Error - Encountered an error (InternalServerError) from host runtime. Also multiple HTTP 4xx and 5xx errors

Question

I can successfully deploy a timer trigger function to Azure but it will not display in the overview, and the only details of the error are Encountered an error (InternalServerError) from host runtime. There are no errors in the activity log. When looking in the diagnostic services, multiple HTTP 4XX and sometimes 5XX errors are issued. The screenshot below only lists one HTTP 400 error but I have gotten 500 and 503. The only other diagnostic concern raised is for the function not triggering.

I am trying to use key vault, storage, app insights, and an Azure database with this function.
Running .NET 8
Somewhat new to Azure

Other people with similar problems used a premium function plan instead of the consumption one, but that plan is far outside our budget range. Is there any other work around for this issue?

Answer 1

@Ella Moody I'm glad to see you were able to resolve your issue. Thanks for posting your solution so that others experiencing the same thing can easily reference this. Since the Microsoft Q&A community has a policy that the question author cannot accept their own answer, they can only accept answers by others, I'll repost your solution in case you'd like to Accept the answer.

. Issue:

You're encountering Function App Error - Encountered an error (InternalServerError) from host runtime. Also multiple HTTP 4xx and 5xx errors.

. Resolution:

You updating all the NuGet packages and it worked fine.

.

What if the issue resurfaces again?

Please share the below details:

1. Function App Resource URI in below format:
   /subscriptions/XXXXX/resourceGroups/XXXX/providers/Microsoft.Web/sites/XXXXX
2. Time of the issue in UTC
3. Screenshot of the error/exception from Function App Down or Reporting Errors section.