Cannot modify header error (JS_Composer)

Hello,

Recently my site went down and i wasnt able to access it. Whenever I tried to access it I got this error – http://prntscr.com/9ehom0

Upon contacting GoDaddy they said I need to disable js_composer plugin and then they disabled all the plugins I had in order to make the site accessible again.

Now the Visual Composer is deactivated and my site is messed up and am afraid to re-activate the site again in fear of repeating/re-encountering the same error.

Can you give me a proper fix.

PS> I Dont have ftp access to the server as I am using GoDaddys’ Managed WP Hosting..

Please respond to me asap.

Thanks.