Forms not submitting with special characters like é

Getting this error
HY000, file: “/home/******/public_html/dmxConnectLib/lib/db/Connection.php”, line: 108, …

SQLSTATE [HY000] General error: 1366 Incorrect string value: ‘\xCC\x011fa…’

This happens on normal textfields as well as on Medium Editor fields, is there anything I am missing from my head section to add unicode char support?