Plesk ask for adding new webspace on every logon.
panel.log contains the following entries:
[2016-01-30 22:38:37] WARN [panel] No webspaces are listed for your account; therefore, no operations are available. Create at least one webspace.
[2016-01-30 22:38:38] DEBUG [panel] Unable to access task/task-progress without subscription
[2016-01-30 22:38:41] DEBUG [panel] Unable to access database/index without subscription
psa.smb_user tables does not have valid records for builtin admin.
Execute the following query:
mysql> update smb_users set ownerId=1,locale='en-US',isDomainAdmin=NULL where id=1;