Ewe bee kowreckt.
We'll get it worked out, wouldn't be the first time that I have found that guitar players speak another language.. ;-)
That's the difference in playing from a chord chart which is just the lyrics with chord notations above the words (and not always above the correct syllable of the word), and a lead sheet which is the melody line on a music staff complete with key signature, time signature, repeat notation, you know, all that stuff to give you direction... ;-)
Absent that, guitar players tend to invent their own ever changing versions of the song. Which keyboard players can work with if the secrets are shared as in "When you say 'let's do this' as you are pointing to the sheet in front of you which is not the same as the sheet in front of me, just exactly what is this 'this'?"
This time we have a week to work it out. Last time we had less than an hour... ;-)
Things are in safe hands ,then.
No need to call the cavalry.