QuickBooks error When contact cannot be established between a specific banking institution and your bank account,quickbooks error code OLSU 1013 may occur. This can be a result of problems with the bank's server. The use of an unstable internet connection may also result in the error code. Changes to FIDIR or making sure TLS 1.2 is active are two ways users can fix this problem. While applying the patch in QuickBooks,quickbooks error code OLSU 1013 a default account can be created.