Checking the credentials and see they haven't changed. Will dig deeper with PayPal.
But while in the admin I now get this
Fatal error: Too many connections in /data/10/1/87/19/1087834/user/1133069/htdocs/bole/store/Connections/PowerStoreConnection.php on line 9
repeatedly but not always.
Line 9 being $username etc. I quit and restarted which made no diff.