Your Map Differs From the Servers Gmod Fix
The most common cause of the "Your map differs from the server's" is that you have an outdated version of the map OR the server hasn't auto-updated to the latest version of a map and you already have.
To properly fix the issue, you first need to remove the map from your GarrysMod folder, which can be found under your Steam folder in your SSD/HDD
- Once you navigate here, click on the maps folder
- Scroll down to the .bsp file that matches the servers, right-click and delete
- After deleting the .bsp file, attempt to load back into the same server. If the issue persists, the server may have a non updated map file. You may also not have enough STORAGE to download the map
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