If you are encountering the issue in which the Desert eagle file is colliding/causing issues. A minor fix has been encountered that so far has worked with 2 instances of the issue.

Make a copy of the mod files from steam local files
Rename the files that are too long (The desert eagle magazines and the PMAG window magazines) to something shorter
Then, when you're able to move the file over to wherever the server files are, just rename them back to their original names.

If you encounter any other fixes, please head to the Nordic discord and create a support ticket and share your info.