help me with Properly signed for Griddify?

Hi guy, i downloaded and extract the zip file and put the griddify folder inside the extensions folder.
It show in extension photoshop. But when i click it: "The Gridify extension could not be loaded because it was not properly signed" Why? please help me

Start by reproducing the installation in Photoshop using the extracted Griddify folder in the extensions directory, then investigate Photoshop's requirement that extensions be properly signed. Done means identifying a supported installation or signing path that allows the Griddify panel to load.

Written by the indexing model from the issue text.