Reason:- Deletion of download or imported file.
- Bank/financial issues.
You should connect the bank accounts with the Quickbooks from the add account option of the banking tab in the Quickbooks and then use the username and Password in the account.
For instant help in resolving Quickbooks error 105, reach out to QBSsolved at 1-888-910-1619
https://www.qbssolved.com/how-to-fix-the-banking-error-code-105/