Outlook no longer opens?

I deleted some files from my laptop to make it go faster again. Apparently something went wrong and I can no longer open Outlook, see photo.

Can someone help me?

Yes, you have probably deleted or changed a few very important files for Outlook, that is, probably deleted or changed files that Outlook needs. Simply reinstall it and the missing files should be available again. Or you are currently trying to open a file that does not fit Outlook's data format - definitely try to reinstall it.

It is already there - the associated Outlook .pst file is no longer available or damaged.

The account must be set up again. Control Panel → Email

In the specified folder, however, the "Outlook" file is available as an Outlook data file (i.e.pst)

If I see it correctly, are you trying to start Outlook or are you clicking on the Outlook icon?

Maybe it has been changed or some components are missing.

Then the file is defective.