Afternoon all, we're aware of network errors (Barclay's error code 102) when trying to login to Barclay's banking as a QuickBooks Online customer.
This is a result of Barclay's online banking being down and has affected all Barclay's customers.
I'd advise to keep up an eye out for their service updates here: https://status.uk.barclays/
This has now been resolved Barclay's end. Let us know in the comments if you see anything different.