Where is the Undo Button? Where is the diagnostic data when a file doesn't save

Please let me know why I keep getting these errors when saving files with unique names and how to troubleshoot. Where are the Undo/Redo buttons such as when I make a crop and want to revert?

If you change the name of the file and it still doesn’t save, it’s possible you’re missing some model files. Please disable antivirus, firewall, VPN, or proxy that may be on your computer. These are known to block the installer from downloading the model files. Then rerun the installer.

Let me know if the error still persists. We don’t have an undo button, you’ll have to make manual adjustments again for now.

What is the ETA for the Undo button. I shouldn’t have to redo an entire sequence to back the last change out.