The last crash shows a vtuber app crashing. Previous ones is streamfx.
Uninstall all plugins. Then uninstall and reintall OBS. Make sure your vtuber app is updated too and compatible with OBS 29.
Always check the plugins are updaed and compatible with the current version of OBS you're running.
Browser sources do consume resuorces, and the more you add the more consumption. Add to this any web browser you have open as each tab causes the same.