I'm trying to restrict the length of the description field. I'v already found the following solution but I'm not able to tweak it to my needs.
https://confluence.atlassian.com/jirakb/using-workflow-regular-expression-check-validator-to-restrict-text-field-in-number-format-859509784.html
My understanding is that I would have to change the expression like that:
^[0-9]{160-255}$<br>The descritionfield should have a length of 160-255 and you should be able to enter anything, lower case / upper case / numbers / ....
But i will always get an error:
We can't create this issue for you right now, it could be due to unsupported content you've entered into one or more of the issue fields. If this situation persists, contact your administrator as they'll be able to access more specific information in the log file.
Which is not the error message I wrote which confuses me further.