Good evening, I downloaded the we mod update and it stopped working. I then uninstalled it but with both the classic and manual installation, the installation cannot be completed. it push on the screen: “there was an error while installing the application. Chek the setup lof for more information and contact the author”
Welcome to the WeMod community. 
Sorry to hear that you’re having issues. The main reason for WeMod not working is interference from antivirus programs. For example, an antivirus deleting a critical file that WeMod actually really needs.
The troubleshooting below is for those getting these error messages or similar:
There was an error installing the application.
Failed to extract installer.
Please follow these steps:
Uninstall WeMod via the Add Or Remove Programs feature found in settings/control panel.
Navigate to these two places and, if these folders still exist on your PC, delete them:
C:\Users\Your_Name\AppData\Local\WeMod
C:\Users\Your_Name\AppData\Roaming\WeMod
Turn off your antivirus programs. Even if it’s just the default Windows Defender.
Download WeMod’s offline installer from this direct link: https://api.wemod.com/client/download Install the software.
Before you launch WeMod, add it as an exception in your antivirus software. You may need to whitelist these specific files if you cannot whitelist the entire folder:
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
If the issue continues after correctly doing the above steps:
Open your antivirus program, even if it’s just the default Windows Defender.
Go to the quarantine menu (alternatively known as the Virus Chest in some programs).
Look for any WeMod files in there that were quarantined despite it being added as an exception. Whitelist and de-quarantine them from here.
i tried all of this but still cant figure it out