Klever

I created an 'unknown mark', filled in a pattern, a problem and a description, but the length of the 'problem' string was more than 15 characters. The error message was shown and a 'save' button was disabled. When I fitted the string, I could not press 'save' anymore, so I had to reload the page and refill the fields again. It is better not to block the 'save' button after error message or, may be, activate it after changing of any string.