As previously stated, there are a number of possible causes for the QuickBooks Error Code OLSU 1013. We've compiled a list of some of the most compelling explanations for this error's occurrence. Take a look at this:
One of the major faults in QuickBooks is that it is obsolete.
If you are using a mode other than express or side by side mode, this issue may occur.
If you've made a mistake with your login credentials.
If internet explorer setup does not support the connection between QuickBooks desktop and internet explorer.
QuickBooks is unable to connect to the bank or is experiencing difficulties doing so.
Is there a problem with the internet connection?
Important things to keep in mind
Before you begin the fixation procedure, make sure you review the following guidelines:
Examine the company's backup file.
It's also crucial to match any pending download transactions.
Check that you can access the bank's website from outside of QuickBooks and that there are no pending notifications.
Also, see if the mistake occurs in bank feeds classic mode. If it isn't, it means that the bank's file is best viewed in classic form.
It's critical to make sure you're connected to the internet and that the Windows firewall isn't preventing QuickBooks connections.
Any pending download transactions should also be matched.