https://bugs.mysql.com/bug.php?id=102465 

[3 Feb 16:10] Adam Latchem 

Using MySQL Workbench 8.0.28 I was able to fix this by changing line modules\wb_admin_connections.py:346

from: 

                             (“DB“, mforms.StringColumnType, “DB”, 100), 

 to 

                             (“db“, mforms.StringColumnType, “DB”, 100), 

 0 

The proposed solution “[3 Feb 16:10] Adam Latchem” worked for me, in the context of MySQL Workbench connecting to a MariaDB database. The fix (for definiteness) is to edit the file C:\Program Files\MySQL\MySQL Workbench 8.0 CE\modules\wb_admin_connections.py at line 346, to change it from 

(“DB”, mforms.StringColumnType, “DB”, 100), 

to 

(“db”, mforms.StringColumnType, “DB”, 100), 

(note change of case in first argument).