failed to start the x server (your interface). it is likely not set up correctly (Mint)

I was trying to configure mouse properties following this guide. I restarted my computer and got this message : > Failed to start the x server (your interface). It is likely not set up > correctly I have tried many methods including this thread on Linux Mint: * Failed to Start the X server *. The error in question is : > Parse error on line 19 of section InputClass in file > /etc/x11/xorf.conf.d/50-synaptics.conf "..." is not a valid keyword in > this section. Section "InputClass" Identifier "touchpad" Driver "synaptics" MatchIsTouchpad "on" Option "TapButton1" "1" Option "TapButton2" "2" Option "TapButton3" "3" Option "VertEdgeScroll" "on" Option "VertTwoFingerScroll" "on" Option "HorizEdgeScroll" "on" Option "HorizTwoFingerScroll" "on" Option "CircularScrolling" "on" Option "CircScrollTrigger" "2" Option "EmulateTwoFingerMinZ" "40" Option "EmulateTwoFingerMinW" "8" Option "CoastingSpeed" "0" Option "FingerLow" "35" Option "FingerHigh" "40" ... //line 19 I assume EndSection I am currently locked out of my desktop. It blue-screens and shows the above message. There is nothing in /etc/share/X11/xorg.conf.d/50-synaptics.conf What can I do to fix this ?