Unable to start .NET application on Plesk with error 500.30: The located assembly's manifest definition does not match the assembly reference. (0x80131040)


Symptoms

  • Application running on Plesk hosted domain fails to start or handle requests with error 500 or 500.30.

  • It is not possible to start .NET application manually, errors like below are provided:

    dotnet %plesk_vhosts%\example.com\httpdocs\example-app.dll
    Unhandled exception. System.IO.FileLoadException: Could not load file or assembly 'System.Runtime, Version=6.0.0.0, Culture=neutral, PublicKeyToken=a1b2c3d4f51234567'. The located assembly's manifest definition does not match the assembly reference. (0x80131040)
    File name: 'System.Runtime, Version=6.0.0.0, Culture=neutral, PublicKeyToken=abcdef12345678'

  • Application example-app.deps.json file contains references to other version of the package.
  • .dll files in the application directory have different version than the one specified in example-app.deps.json

Cause

Dependency file inconsistency or wrong version of the files.

Resolution

Rebuild application and install correct dependencies. Consider contacting with the application developer to apply this.