MySQL Manager no longer works at all

http://mylocalip:2030/admin/index.php?module=mysql_manager

This used to display all the MySQL databases and users just fine.
Now it's blank -- it never loads them.

Perhaps a related bug: last time I rebooted the server, it didn't recover! MySQL in particular was a sticking point. I had to log in locally and manually start MySQL to get the server back up and running.

And also possibly related: I can no longer log in to MySQL as root.

Please advise.

CWP version: 0.9.8.260

Also getting this error:
DBI connect(';;mysql_read_default_group=client','root',...) failed: Access denied for user 'root'@'localhost' (using password: YES) at /usr/bin/pt-show-grants line 1338

Try to reset MySQL password and see if this resolves issue or not.