Sporadic error since upgrade to 5.8

I have…

I’m submitting a…

  • [ ] Regression (a behavior that stopped working in a new release)
  • [ X] Bug report
  • [ ] Performance issue
  • [ ] Documentation issue or request

Current behavior

Getting this sporadic error since upgrading…crashes the apppool. Obviously, the DLL exists.

An assembly specified in the application dependencies manifest (Squidex.deps.json) was not found:
    package: 'Microsoft.Extensions.Http.Polly', version: '3.1.13

Minimal reproduction of the problem

Unknown

Environment

  • [ ] Self hosted with docker
  • [X ] Self hosted with IIS
  • [ ] Self hosted with other version
  • [ ] Cloud version

Version: 5.8

Browser:

  • [ ] Chrome (desktop)
  • [ ] Chrome (Android)
  • [ ] Chrome (iOS)
  • [ ] Firefox
  • [ ] Safari (desktop)
  • [ ] Safari (iOS)
  • [ ] IE
  • [ ] Edge

Others:

Just discovered a little more infor…a developer is using v7.4 of the Squidex.ClientLibrary…when calling this method to create a newSquidexClientManager , it kills the server. The above error is written to the Windows event logs. He gets “failed to retrieve access token for client”.

Nevermind. Believe I found the culprit.

What is the problem?