After update to 9.1.2 version can't duplicate files in FTP connection

[lvdaacid]

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Describe the bug
As title

To Reproduce
Steps to reproduce the behavior:

1. Simply updated Cyberduck to 9.1.2 version from 8.x.x version
2. Click on '....'
3. Scroll down to '....'
4. See error

Expected behavior
A clear and concise description of what you expected to happen.

Screenshots
If applicable, add screenshots to help explain your problem.

Desktop (please complete the following information):

• OS: MacOS
• Version 10.13.6

Log Files
Please include the log file. You can reach the logging output in Preferences → Connection.

Additional context
Add any other context about the problem here.

[tatze96]

I can reproduce the described behavior. This seems to be isolated to FTP(S), as I can't reproduce it with WebDAV or S3.

[lvdaacid]

For the time being I am back to version 8.8.2.
It is essential to be able to quickly duplicate files to preserve the original ones in development or testing

[justdan0227]

Any update on this? I can no longer duplicate either now

[lvdaacid]

It is essential to uninstall all system files of the version to be deleted.
To do this I use AppCleaner.app which deletes all existing system files except for the connections already set in favourites
So I restored the old version without any problems

[dkocher]

Validation that causes the option to be disabled for FTP was added in 45e615a.