This is how I fixed the "CMDL cache" issue and got it working again.

1: Favorite and then uninstall ALL addons.
2: Run Gmod (I ran the HL2 campaign and episodes).
3: Reinstall your addons a few at a time.
4: Try starting campaigns every 5-8 addons.
5: you can eventually reinstall everything.
6: Make SURE none of your subbed mods were deleted, taken down, or the profiles that made them were deleted. (It seems like Gmod doesn't know how to respond when this has happened.
7: If mods HAVE been deleted uninstall them then restart Gmod.

This is how I fixed the "CMDL cache" issue and got it working again. 1: Favorite and then uninstall ALL addons. 2: Run Gmod (I ran the HL2 campaign and episodes). 3: Reinstall your addons a few at a time. 4: Try starting campaigns every 5-8 addons. 5: you can eventually reinstall everything. 6: Make SURE none of your subbed mods were deleted, taken down, or the profiles that made them were deleted. (It seems like Gmod doesn't know how to respond when this has happened. 7: If mods HAVE been deleted uninstall them then restart Gmod.