Hello there!

Another thing you can try is to completely close WeMod from Task Manager and then ensure that the following WeMod files are whitelisted (added as an exception) in your anti-virus program:
- Update.exe, found in the folder located at C:\Users\YOUR_NAME\AppData\Local\WeMod
- WeMod.exe, found in C:\Users\YOUR_NAME\AppData\Local\WeMod
- WeModAuxiliaryService.exe, found in C:\Users\YOUR_NAME\AppData\Local\WeMod\app-VERSION_NUMBER\resources\app.asar.unpacked\static\unpacked\auxiliary
You need to add these .exes as exceptions individually. Selecting the whole WeMod folder as an exception sometimes doesnât work.
If that doesnât work, uninstall it again and re-install from this link instead of from the WeMod homepage: https://api.wemod.com/client/download.
(Optional but advised - before re-installing, download the free CCleaner software and use it to scan/clean your registry of stuff that shouldnât be in there).
Even if you havenât changed anything on your PC, itâs still possible for files to randomly become corrupt for absolutely no reason. Thatâs Microsoft for you. 
I know how annoying it is when things donât work how theyâre supposed to, so hopefully one of these help. Let us know if either do. 