I didnť notice it should be updated. My fault. After updating it works fine. I apologize for my stupidity and thank you, Igor. Solved.

there are no any bugs, you didn't update theme

https://rehubdocs.wpsoul.com/docs/rehub-theme/for-developers/wordpress-5-5/

Hi,

1) the theme does not work properly with WP 5.6 and 5.5 for me. In theme options when I click on any tab or when I change any setting on the first tab and hit save, nothing happens. Maybe some jquery problem?

When I downgrade WP to version 5.4 everything seems to work fine. Wheres the problem?

2) I am missing almost all blocks in Rehub Helper modules, there are only 3 of them (screen in attachment).

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I think there will be a lot more problems, but these are bothering me the most so far.

Thank you