It seems like Action intermittently causes the FiveM Client to crash on startup but works fine if FiveM is first launched then Action secondly. Seems to be having problems hooking to the FiveM_GTAProcess.exe process. Not sure if this is a problem with Action or the FiveM Client. Possibly a delayed hook timer can be a workaround?
OS: Windows 10 v1909
Video Card: GTX 1080 Ti v465.89
Memory: 32GB
Monitor Resolution: 2560x1440
Game Problem: GTA 5 (FiveM Client)
[ 9562] [ DumpServer] 29428/ Process crash captured. Crash dialog content:
[ 9562] [ DumpServer] 29428/ USER32.dll!GetClientRect (0x14)
[ 9578] [ DumpServer] 29428/ An error at USER32.dll!GetClientRect (0x14) caused FiveM to stop working. A crash report is being uploaded to the FiveM developers.
[ 9578] [ DumpServer] 29428/ Stack trace:
[ 9578] [ DumpServer] 29428/ USER32.dll!GetClientRect (0x14)
[ 9578] [ DumpServer] 29428/ dxgi.dll!?CheckOcclusion@CDXGIFactory@@SAJPEAUHWND__@@0PEA_N1@Z (0x40)
[ 9578] [ DumpServer] 29428/ dxgi.dll+31920
[ 9578] [ DumpServer] 29428/ dxgi.dll!CDXGISwapChain::PresentImpl (0xca)
[ 9578] [ DumpServer] 29428/ dxgi.dll!CDXGISwapChain::Present (0xce)
[ 9578] [ DumpServer] 29428/ action_x64.dll+0
[ 9578] [ DumpServer] 29428/ 0x8cfa90d0
[ 9578] [ DumpServer] 29428/
[ 20422] [ DumpServer] 29428/ Crash report service returned si-undefined