Your water heater made 3 attempts at lighting off.....no main flame occurred so it 'locked out' (stopped trying and RED light came on)
The push to reset is a manual reset of the High temp t-stat. If it didn;t resetting nothing would have happened...no clicking etc. When high temp t-stat opens it shut down all operation.
SO that is NOT the problem
Problem is there is not enough propane in the line to water heater and no flow
YET!!
Need to try water heater again.
Let it click click click even if it locks out.
Then again.until flow is established thru line at water heater.
Hint......light off all stove top burners on HIGH and let them burn a minute then try water heater while stove top burners are still on (this will place a demand on Propane Regulator and establish flow thru system.)
Provided flames on burners are nice and strong/steady and blue.
AND change in elevation is NOT the issue either.
Try and post back