Hello! I am still waiting for K2 Joomla 4 version. But now I try to create Menu -  Blog (User Page). All works good except Meta Title and Meta Description. I am feeling these fields but they doesn't work on front end. It replaced by name of author. What do I do wrong? Thank you! 

wrote:

To address the issue of Meta Title and Meta Description not displaying correctly in K2 Joomla 4:

Check K2 settings for metadata overrides.
Review template overrides, if applicable.
Verify global configuration settings for Site Name and Meta Description.
Examine menu item overrides for metadata fields.
Ensure both K2 and your Joomla template are up to date.
Enable Joomla's debug mode for error messages.
Seek support from the K2 community forums or documentation.
These steps should help identify and resolve the problem.
 

I'm also having this problem and don't know how to solve it. Glad you shared the remedy.
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I'm currently trying to use the Yoothemes Pro library to get images from a folder. But I can't figure out how to add tags to it.

What do you mean: "author overrides in articles"?

I've solved this problem using JSitemap Pro. It's not the best solution but it works