How to restore bugged mod element

I'm working on a mod, and one of the procedures got corrupted somehow. Whenever I open it, it's completely empty.
Under warnings and errors, it says "Exception while compiling blocks: Could not find start block!"

I've tried reloading backups of the workspace, but the error still persists. I can't remake the mod element from memory, and without it, the whole mod stops working.
Is there any way to get back the lost code? I desperately need to work on this mod, and can't afford having to remake a lot of it from scratch.