Could you try to copy and paste the line below to your /etc/udev/rules.d/97-3dprinters.rules file?
SUBSYSTEM=="tty", ATTRS{serial}=="754393237353519142", GROUP="dialout", MODE="0660", SYMLINK+="tty-PRUSAI3VHR"
Or, if you want to break the rule in multiple lines it’s like this:
SUBSYSTEM=="tty",\
ATTRS{serial}=="754393237353519142",\
GROUP="dialout",\
MODE="0660",\
SYMLINK+="tty-PRUSAI3VHR"
Try again please.
P.S.:I forgot to mention this step: if you receive this message:
Click on the enter key and on the connect key again and the MatterControl should connect to the printer.
I think it could be a bug…