NinjaTrader: Unable to restore from backup, cannot find central directory

I recently encountered what initially appeared to be a NinjaTrader (NT) issue when trying to restore from NT’s propriety backup. The procedure gave me the following error:

“NinjaTrader was unable to restore the selected backup archive file. Cannot find central directory.”

This was odd as I have successfully restored from the same file onto a couple of machines that I use for back testing strategies.

After trawling Google and the NT support forums, I stumbled across an article in GitHub indicating that the issue may be a corrupt zip file.

The issue was resolved by overwriting the corrupt zip.