Why can’t I open my QuickBooks company file?

https://quickbookhelpdesk.com/blog/quickbooks-data-recovery-methods/

QuickBooks data files contain valuable business information, making recovery an important priority whenever a problem occurs. Company file damage, accidental deletion, storage issues, software conflicts, and incomplete updates are among the most common causes of data loss. Checking the file location, restoring from a backup, updating QuickBooks, reviewing storage space, copying the file to another location, and reinstalling the software can resolve many recovery problems.