Ableton Rewire Crash

Hi there.
I’ve posted about this on another thread but haven’t received a response. My issue is cubase suddenly doesn’t rewire Ableton into an existing project. It worked absolutely fine until yesterday- now when I manually try and rewire, cubase crashes. I haven’t updated any software or operating system. I’m running Cubase 9.5.2 and Ableton 10. Any ideas? Thank you!