DLL files where you installed arma, creating a new profile, verifying in game cache or even reinstall arma from scratch. Hope this guide helped atlaset someone and if it didn't i would look in to different fixes like deleting the. Then delete the file and launch Arma 3 and join the asylum server, you'll start Downloading The mission file!
Look for a file named Altis_Life.Altis and it would look like this Arma 3 Steam Query data overflow To add ARMA3 missions to your Arma 3 server you will need to obtain the mission file for the mission you require.
You might ask why to delete a mission file and that and that's simple Mission files can easily corrupted and if it does you might now be able to join the server before a patch relishes. After a request i decided to make a guide on how to delete Asylum and any other Arma 3 mission file.