Just completed the first steps of the big score, yet Solomon has not given me a second mission?

[iSTOODinPOOP 0]

I have not played GTA V's campaign in years and decided to give it another shot as I loved it. I have gotten all the way to the first steps of the big score doing all the side content I can and loving the game but something was not right with me. I felt like a large chunk of content had been missing and I found out why. Even though at this point I should have completed the last mission in the series Solomon never gave me a second mission after the first, the one where you get the actor and director in the Helicopter. and I am sure the story cannot continue without beating those. I could only find one thread on Reddit with a possible solution being to complete all the parachute jumps but that didn't work. I've pumped 40 hours of pure fun into this save and I really don't want to restart it. Is there a way to get Solomon's mission to appear to continue the game as normal?