Retention not working?

Hello,

I’ve created an invisible tag and automatic tagging rule. Then (I think) I’ve created retention rule: selected previously created tag and set to delete files after 30 days and when i clicked create button nothing happened… How to find out if creted rule exist and is active? Now when I try to create this rule again, there is no such tag in search box. I have nextcloud 21.0.1 and Retention 1.9.0.

Greetings,
Martin