Feed Error- Please help

Can you post a link to your site please?

https://www.videogames.net.in/feed/

now getting new error when i diasabled and enabled all plugins
New error:
This page contains the following errors:

error on line 3 at column 6: XML declaration allowed only at the start of the document
Below is a rendering of the page up to the first error.

Okay, I suggest you disable all plugins and switch to a default theme like Twenty Fourteen. Then work through methodically enabling one plugin at a time.

ok thank you, let me try

same problem, does it have to do any thing with php version ?

Please reset the theme to Twenty Fourteen and let me know when you’ve done it.

done, plz check it, if necessary i can provide you with admin id n pass

feed is working in internet explorer now but chrome giving same error

Okay. And please disable all plugins too.

disabled, thank you for helping me

left seo by yoast otherwise it will reset all settings

I can still see plugins enabled, .e.g. JetPack, Contact Form 7, Mash Sharer, et al. Maybe you need to need to clear the WP Super Cache – I’m viewing a cached page here.

only seo by yoast and jetpack is enabled , nothing else

and wp super cache do i disable theme also

It’s still serving a cached page. Please ensure you clear the cache.

You need to disable all plugins.