Empty domain verification value

A similar problem has already been pointed out by others, but I am also having problems with an empty verification value during the verification process:

I didn’t find a solution in the forum.

Thanx
Latz

Update: I’ve getting this popup:

error

Hello @latz

Thank you for reaching out in relation to Our Domain Validation process, the next steps will be sent to you via DM. Please refer to our domain validation resource: Domain Validation Explanation for any further questions you may have about the process.

Thank you.