Nik 4 Perspective Efex will not open in Photoshop

Unable to open Nik 4 Perspective Efex in Photoshop and receive message “The command “unknown” is not currently available”.

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This problem has persisted for a while now. In my case, just since the last major update to Photoshop, but for the original poster evidently a while longer. I opened a bug report with DxO on November 9 and was told a couple of days later that, “At this time, Adobe Photoshop 2022 is not officially supported for use with the Nik Collection apps. […] The developers will make every effort to resolve these issues as quickly as possible.”

DxO tech support also suggested that I uninstall and re-install the NIK Collection, which I have done to no avail.

Is anyone actually able to use Perspective Efex with the latest version of Photoshop? The Nik 4 support page for this forum doesn’t even list Perspective Efex… I hope that’s not a bad omen!