When multiple profiles are registered in VRC Quick Launcher 1.4.0 and "Launch all selected" is clicked, the EAC may fail to launch.
The error seems to be of multiple types.
Error code : 30005 (CreateFile failed with 32.)
Error code : 30005 (Invalid binary size.)
Error Code: 30005
Process Exit Code: 0h
This error does not occur when multiple processes are started independently by clicking on each one in turn.