Since I bought my Mac Pro (M3 Pro Chip) this year (2024) March, I have been running R and RStudio on an Intel infrastructure because RStudio won't accept a silicon arm64 one. Today I decided to try installing the arm64 .pkg and still encounter the same problem. Below is the log for your assistance:
2024-05-18T15:40:11.358Z ERROR Failed to load http://127.0.0.1:25977: Error: ERR_ABORTED (-3) loading 'file:///Applications/RStudio.app/Contents/Resources/app-x6$
2024-05-18T15:40:11.403Z ERROR ERR_FAILED (-2) loading 'file:///Applications/RStudio.app/Contents/Resources/app-x64/.webpack/renderer/splash/index.html'
2024-05-18T15:40:12.011Z ERROR IpcError: getStartupErrorInfo: Cannot set properties of null (setting 'innerHTML')