Thanks for reply ...
hub_communications
1 server [token] hubdirectory http://hubdirectory.moodle.org Moodle.org hub directory 1 0
2 client [token] hubdirectory http://hubdirectory.moodle.org Moodle.org hub directory 1 0
The tokens look to be the same length (number of characters) as others seen in the table.
With debugging on:
An error occured during registration, please try again later. (Invalid token - token not found | ERRORCODE: invalidtoken)
which is the same error seen without debugging on.
No errors in any other logs of server.
Should I remove the tokens?
'spirit of sharing', Ken