@reza.seedin The last version of WebStorm working with the SDF Plugin is: WebStorm 2019.1.4 Build #WS-191.8026.27, built on July 15, 2019 The plugin is not working with version greater than that. You can use JetBrain Toolbox to have multiple versions installed as a workaround.

I'm using 2019.2 if that helps