I'm not importing a plan from SIM Brief just inputting manually into the FMS.
PHNL/KLAX
ALTN: KSFO
After inputting the basic flight info and going to flight plan I select the Alternate KSFO and select 28L with no TRANS and no STAR and after selecting *INSERT the FMS goes dark and all of aircrafts buttons and selectors don't respond. Knobs will turn etc. but no change in value at all for anything. The simulator doesn't freeze and camera still works and can move around but the aircraft systems just stop.
FS2020
Windows 11
RX6700 XT
Click LSK6 Then blank screen
Nothing is selectable...