[Juan Mortyme]

I am using 1.0.37

You need update to 1.0.37.1 . Only this version work fine.

Thank you very much for your help. where can I get this version to install it?

@Eladios 
You are lucky, I still have the "fixed v1.0.37" which is known as v1.0.37.1 on my google dive. here is the link.

Make sure you keep a copy of this somewhere handy and either don't update it or reinstall as required.

I've found that using some newer "fixed" versions work fine but you MUST at least start to run through (browse) your library with v1.0.37.1 and use that version if you delete your thumbnails or simplecache. This addon is no longer being updated for Leia so any newer versions are most likely "fixed" versions from a third party.