Invalid SSL State - insufficient support of accented characters/diacritics
While creating new "Web Domain" in "Sites" in SSL tab, when you fill out State and proceed, you get following error
Invalid SSL State. Valid characters are: a-z, 0-9 and .,-_&äöüÄÖÜ
I can leave that empty - but can I? That is not clear - my country is also a state and internal division is historical regions or administrative regions (State is mainly a US thing, because USA is a federation of states).
Support of umlauts only is very insulting. https://en.wikipedia.org/wiki/Diacritic
correct behaviour & fix
This validation should (xor) a) only allow non-accented characters or b) support all accented characters used in all states around the world
Server OS: Debian 9 (Stretch) ISPConfig 3.1.15p2