Error on pasing ssh-key to repository

I want to add a ssh-key from my server to my repository to get "push-access" on my server. if i paste the key into the form, nothing occurst. The form button is inactive but i get an js/ajax error in my debugger.

Failed to load resource: the server responded with a status of 500 (INTERNAL SERVER ERROR)
bitbucket.org/:5 Uncaught Error: Syntax error, unrecognized expression: {"error": {"message": "'ascii' codec can't decode byte 0xc3 in position 21: ordinal not in range(128)", "id":