Sudden Issue With Playback on One Session

[Snafu]

Thank you again, if the reinstall and any other ideas don't work I'll definitely try that, just scared of doing anything that will make me lose my sessions (this is my 2nd last song for an album i started in 2014 and my panic levels when touching windows related stuff is high...but i'm for the idea, I'm not attached to win10 just need to make sure i do it safely. Still really hope it's all a simple fix, I don't know if that sounds deluded, just never had an issue that wasn't fixable, I'm possibly still in denail stage I'll try bouncing the tracks too to see if that works...