Variable 'sql_mode' can't be set to the value of '' (1 reply)

I try to connect to MySQL (Ubuntu 20.04) running on our network and get the following error:

Variable 'sql_mode' can't be set to the value of '
'

Notice the newline in-between quotation marks. MySQL Workbench version 8.0.21 running on Windows 10. I can connect to this client using Workbench on another computer running Ubuntu 20.04, MySQL Workbench version 8.0.18.