Padshop and Retrologue will not make a sound


I have been working on a project for a few weeks now, I opened it today, and all of my instrument tracks for Retrologue and Padshop will not make any sound. Serum and Spector both still seem to work. Going back to days old versions of the file seem to make them work, but this loses me a lot of work that I don’t want to have to recreate. If I try to create new instrument tracks with the same settings, they seem to work until I try and bring in any automation. This seems like a very odd bug, has anyone seen anything like this before/does anyone have a fix? I am on cubase 8.5.

Thank you.