Miles & More (Lufthansa, Austrian, Swiss, and other partners) - Can't change seat in "My Bookings"

Maybe I have missed something in threads here. I did a search but didn't find anything relevant.

I am flying ZRH-MUC-KRK return on LH in M.
Went to check my seat assignment online and (contrary to earlier days) am no longer able to change it in "My Bookings". I know I am flying in economy, but I am a SEN, so I should be able to change my seat assignment, no?

Thanks for your feedback

Just go to https://www.lot.com/de/en/web/newlot/check-your-reservation and re-enter your M&M number, then try again.

Thanks....worked like a charm :)