Unable to import plugin from manifest

Hey ​@Mahesh More, thanks for reaching out! 

Are you also having issues to import a plugin from a manifest file through the browser? 

Can you try another way on the desktop app? Please follow these steps:
 

1. Open the Figma desktop app.
2. Create or open a file.
3. In the upper-left corner, open the Figma menu and select Plugins.
4. Under Development, select Import new plugin from manifest....
5. Follow the prompts to import your plugin.

 
Here is a screenshot example:

Let me know if this works for you, happy to help out further!