It doesn't crash when I access my emial online. It only crashed on the downloaded version on my computer.
This indicates that the installation, specifically the installation of the classic version of Outlook, is the problem here—or files used by Outlook.
General troubleshooting for Outlook can be found at https://support.microsoft.com/en-us/office/troubleshoot-outlook-for-windows-issues-241bb0fc-b201-4bb2-98d3-74750a27029e#id0ebbf=classic_outlook . See also the slipstick.com forum at https://www.slipstick.com/outlook/basic-troubleshooting-steps-for-outlook/ .
You stated you tried some troubleshooting techniques already, but maybe not all of them.