Reactivate Photoshop Plugin

I’m trying to bring a fairly simple Photoshop plugin back to life. I still have a legitimate license key, but on my current setup—Photoshop 2026 (version 27.0)—the plugin keeps throwing up its old verification dialog and refuses to complete the check.

What I need is a clean, working solution that lets the plugin launch and run. From what I understand, the plugin was written in JavaScript and relies on the legacy CEP framework, so knowledge of Adobe’s scripting/UXP ecosystem will be essential. I’m not asking to bypass licensing; the key is valid—something in the handshake or call-home routine is simply broken.

If you can diagnose the failed verification loop and either patch the plugin, rewrite the activation step, or provide clear instructions that get it operational, that’s the outcome I’m after. A quick screen-share or concise step-by-step notes that replicate the fix on my end would count as delivery. Please let me know your approach and any similar experience you have with updating or repairing CEP/ExtendScript plugins.