Outlook starts and then closes immediately

Is there any way to restore Outlook (desktop version, classic) to a working state? After Windows updates and user rights updates, Outlook went into a state where it opens but immediately closes afterwards.

I have three different email accounts connected to Outlook, and now I can no longer access two of them over the network. Outlook’s email databases are in .ost format, which means I cannot access them in any way anymore.

I read that this problem has been reported before, but I haven’t been able to fix it. It’s crucial for me to access the .ost emails (there are over 100,000). Could anyone help or know a working solution to this issue? (I have already reinstalled the programs, etc.)