Don
just hold the Spool/Ignition-starter button down, this will run just the starter motor. You will hear if it is slipping and the rpm will not reach the expected 5-6,000 rpm.
My guess is it’s not that, low rpm message is lack of fuel, so it does not go past the initial ignition.
Hold down limit (blue) button and press +
Release both buttons and it should say Url Accl 1 what ever the figure is (0.100. 0.150. 0.175) hold the change value button and use + > to increase this figure a couple of points ( 0.120. 0.170. 0.195) just approximate figures.
try again.