garrysmod wont open

when i try to open garrysmod it says Failed to load the launcher DLL: the specified procedure could not be found.

im having a related problem, gmod will start up but its window wont open,
and my avatar colour will go from blue to green and back to blue >.>
Blue meaning online status
and green meaning in game.

It is due to a source engine update. Garry already fixed it, but valve first needs to approve the update before it will be released. Be patient, fresh air is outside to breath ;D

so it’s gonna be fixed soon :smiley: