Please try using OBS in portable mode
https://obsproject.com/forum/resources/obs-and-obs-studio-portable-mode-on-windows.359/
Do not install any plugin in it. Test it as is, adding just a scene and a source. If all goes well, import the scenes you are actually using and test it. If all goes well, then one or multiple of the plugins your using are at fault. If not, please attach a new log file from the portable version test.
Make sure to select the correct encoder and not use a deprecated one.
Also, make sure you have the GPU driver updated, not from within Windows Update (old version) but directly from AMD.
And follow directions and recomendations on the analyzer:
OBS (Open Broadcaster Software) is free and open source software for video recording and live streaming. Stream to Twitch, YouTube and many other providers or record your own videos with high quality H264 / AAC encoding.
obsproject.com