Howdy, GTygert. 

Let me share some information on what is error OLSU1013 in QuickBooks. QuickBooks error OLSU 1013 takes place when QuickBooks fails to communicate with your bank or financial institution. It can occur when you have authorized an inactive bank account for online banking in QuickBooks. 

Improper setting of online banking in QuickBooks can also promote error OLSU. When the error occurs, you may not be able to update your account information or download the latest transactions from your bank. 

Error code OLSU 1013 can be triggered due to several reasons listed in the below-given points: 

• Weak or unstable Internet, preventing QuickBooks from connecting with the bank
• Incorrect user ID or password can also promote QuickBooks error OLSU 1013
• Bank’s server is under maintenance
• Unsupportive configuration of the Internet Explorer deterring QuickBooks from connecting with the Internet
• Outdated Banking Institution Directory
• When you are not using Express or Side By Side Mode 

QuickBooks error OLSU 1013 can be removed easily with a few simple troubleshooting procedures: Here's how:  

• Procedure 1: Modify Internet Explorer Settings 

• Procedure 2: Deactivate All Accounts Having Online Services 

If none of the troubleshooting procedures bring luck to the eradication of QuickBooks Online error code, then contact us using the contact number in this link: QuickBooks Online Support. 

Let me know if there’s anything else you need. I’ll be around to help. Wishing you the best!