Ticket containts illegal characters

Hi,

I'm trying to make a ban appeal for like a month now, but I can't because it contains illegal characters.
I have literally taken every :";'!@#$%^&*()_+-= out of it. My ticket contains only letters, numbers, dots and commas. I have even tried to write out the numbers but that wouldn't help. I have cntrl+F'd all these characters and I am certain my ticket doesn't contain them anymore.

I already made a thread about it but it didn't help, so do you perhaps have an idea how to fix this?