Issues on Mac OS X Big Sur

Hello, I'm experiencing issues while creating new rules on Mac OS X Big Sur. Hazel version is 4.4.5. I have erratic response of the keyboard while trying to match contents in the field. Basically it's impossible to enter text...and therefore to create new rules

Please note that all Big Sur compatibility work was put into Hazel 5. Hazel 4 has not been tested on Big Sur and no work is planned for it. For more details on Hazel 5, go here: https://www.noodlesoft.com/kb/hazel-5-faq/

Thank you for replying, I had considered to upgrade to version 5 (I love Hazel). Simply I though It wouldn't be practically mandatory.