Hi Forum.
A week ago I upgrade from version 14.5 to 16.6. Everything seem OK but the staff started experience weird behavior from osTicket.
First, some Agents were unable from login once their session expires.
Others tried to attach a file (.csv, .txt, .pdf so far) but the system prompt "File Upload Error FILE_NAME undefined 500".
Sometimes, even though they attach a file, that attachment is NOT send it in the email.
First point a check PHP acces logs and I got code "422 Unprocessable Entity"
I solved the second point by specify the extension of files
but now the problems is sometimes they can´t attach the file at all.
OS: Centos7
PHP: 7.0.33 then, 8.0.28 now
mysql: 10.4.18 then, 10.4.29 now
