Corrupted elements

Hello, I would like to talk about a problem that occurred during the development of my mod using mcreator. I was making the mod and I noticed that all the elements were "corrupted", and this did not happen the day before, and when I went to compile the mod, everything had been deleted, with the exception of some elements that I made today. The error message said "doesn't have saved instance, is corrupted, or incompatible", this was true for all elements of the mod.