Yeah I checked just now - your Meeting Attendance object doesn't have any added fields at all. No Meeting ID. No Contact Name. But I don't see them in Meeting either or in the Pitch object, so if you did those steps, you must not have been clicking the Save buttons or something. There's nothing in there.
You need to go to Setup > Object Manager > Meeting Attendance and then do Steps 78 thru 85 but in 85 just click Save, not Save & New.
Yeah I checked just now - your Meeting Attendance object doesn't have any added fields at all. No Meeting ID. No Contact Name. But I don't see them in Meeting either or in the Pitch object, so if you did those steps, you must not have been clicking the Save buttons or something. There's nothing in there.
You need to go to Setup > Object Manager > Meeting Attendance and then do Steps 78 thru 85 but in 85 just click Save, not Save & New.
Then those things will show up in 102 and 115