PenciDesign replied
Hi,
If so, you have some issues with your hosting. Let's login to your hosting > File Magager > publish_html > wp-content > plugins > delete folder 'js_composer' there.
After that, go back to your admin and go to Appearance > Install Plugins > and re-install this plugin.
Appearance > Install Plugins just appears when you removed one in all plugins come with this theme. It will doesn't appears when you installed all recommend plugins come with the theme.
Best Regards,
PenciDesign