GMod Crash on Workshop Complete

Help I am crashing on gmod when I join killer RP when it says “Workshop Complete” here is the error log http://dumps.metastruct.uk.to/dumper.py?dump=hl2_160118_crash_2016_1_29T17_58_38C0.mdmp

Go to steam, click games, view game library, Find “Garry’s Mod”, Right click, Properties, LOCAL FILES, Verify Integrity of game cache, Open game after done downloading, open console, type “mat_dxlevel 95”. If that dosn’t work then uninstall the game. After, delete the steam/steamapps/common/gmod file.
Then, reinstall the game and type “mat_dxlevel 95” in console.