The Wishing Well triggers a save. Does the game correctly save by other means? It will save periodically on its own, but that can take a while to wait for. The other way is to go into settings and force a save there.
When my game was corrupted, it crashed every time it tried to save.
I expect it is key to determine if it is the wishing well specifically causing the crash, or any sort of save.
If it's any save, you need to contact support. For me, it took a while (about 3 weeks, I think), but they did restore my game exactly where I'd left off. Minus Bash, for some reason, but I just re-entered his code.