glyphsFileFormat plugin cant displayed correctly on the export panel

I create a glyphsFileFormat plugin use objc, and didn’t add any code,when I bulided it, it didn’t display this plug-in in the export panel.

Is your file format plugin installed? Verify that it is located in the plugins folder by choosing ScriptOpen Scripts Folder in Glyphs and looking in the Plugins folder.

I have successfully installed it, which can be found in the plugins folder.It didn’t display this plug-in in the export panel.