Welcome to the WeMod community. 
The most likely reason for this issue that you are experiencing is due to an antivirus program interfering. Give these steps a try:
- Turn off your antivirus temporarily.
- Download and install WeMod from this direct link: https://api.wemod.com/client/download
- Once installed, add WeMod as an exception in your antivirus before you launch it.
There are some additional steps if you have either of the following:
Let us know if this solves the issue you’re experiencing or not.