Post-edit Compare error [The path is not of a legal form]

Dear fellow Studio users/developers,

Please help us out on the error we are having using Post-edit Compare. The plugin throws 2 types of errors:

1. The path is not of a legal form;

2. The process cannot access the file 'C:\Users\pc777\AppData\Roaming\PostEdit.Compare\PostEdit.Compare.Report.xml_48c4c16c-3a06-463e-957a-0e2f6b8ebe91.xml' because it is being used by another process;

We have tried wiping the C:\Users\pc777\AppData\Roaming\PostEdit.Compare folder, reinstalling the plugin, installing it on a different machine or different version of Trados and it still throws this exception.

Platforms tested:

Windows 10 Studio 2015 SR3

Windows 10 Studio 2017 SR1