Reported for: Toolset Forms 1.9
Resolved in: Toolset CRED 126.96.36.199
The CRED button appears broken in Gravity Forms confirmation settings editors.
After investigating the issue, we realized that the CRED button should not even be offered there.
This issue will be resolved in the upcoming CRED release.
To apply the errata, download and unzip the file containing the patch and upload the file it contains to ../library/toolset/cred/embedded/classes/ replacing the file with the same name.