Unable to login to Plesk as a customer after CBM upgrade to 11.5:
The following error appears when trying to repair SSO configuration:
# /usr/share/plesk-billing/repair-integration --command=repair-all ... Connecting the panel 'remote Panel name' to the SSO service....[ FAILED ] ERROR: Registration of Plesk Panel in SSO failed with errors: (1037) Cannot request registration in Identity Provider ...
This is Plesk internal issue #PPPM-1510, which has been fixed in Plesk 11.5 microupdate #38.
Apply the latest Plesk microupdates.