Thanks for the replies! But unfortunately no, it happens with whatever I type, also with random strings that could not possibly be an existing user name. When I hover the mouse on the little traffic sign I get the message above in a tooltip:
Thanks for the replies! But unfortunately no, it happens with whatever I type, also with random strings that could not possibly be an existing user name. When I hover the mouse on the little traffic sign I get the message above in a tooltip: