Manifest definition .. does not match the assembly reference

I just upgraded from 1.38 to the latest version. When I attempt to use aspose.pdf Im getting:

The located assembly’s manifest definition with name ‘Aspose.Pdf’ does not match the assembly reference.

Description: An unhandled exception occurred during the execution of the current web request. Please review the stack trace for more information about the error and where it originated in the code.

Exception Details: System.IO.FileLoadException: The located assembly’s manifest definition with name ‘Aspose.Pdf’ does not match the assembly reference.

Dear MarkAurit,

Thanks for your consideration.

Please have a try to remove the Aspose.Pdf assembly from your project’s references and add the new version of Aspose.Pdf assembly to the references again.