"After Effects can't continue: damaged item" when trying to save Team Project

Like the title says, whenever I try to Share My Changes on a Team Project, I get this dialog box: "After Effects can't continue: damaged item. (26 :: 52)" during the Save Team Project process. It doesn't crash, and it doesn't stop responding. After checking with the other person on the project, they now apparently can't open the project on their end, either.

Not sure what's going on. After Effects is updated, we're using the same version, and everything else about the project seems to be working fine.