Product is not getting saved/updated from Magento admin panel

[kshitij1991]

It was working and suddenly it stopped saving/updating the product data from Magento admin panel and it keep showing loading please find screenshot. While inspecting the cause of error it response in console is -

{"error":false}
<style>body {border:10px solid red;}
</style>

Not able to find what is the cause of error also saw this question in Stackoverflow but it does not able to solve my issue. Any help will be appreciated, thanks in advance.

EDIT : 

Due to image is not showing in my post please find image on my stackoverflow question here - http://stackoverflow.com/questions/39121168/product-is-not-getting-saved-updated-from-magento-admin-...

[OST Agency]

Please send the screenshot again. it is not correctly uploaded. Also, it would be better if you share your site URL.

[kshitij1991]

Thanks for replying, image is not showing in my post please find the image in my stackoverflow question http://stackoverflow.com/questions/39121168/product-is-not-getting-saved-updated-from-magento-admin-...

[OST Agency]

You need to clear cache from magento admin:

flush magento cache and flush cache storage

If that won't help, try to clear /tmp directory on server.

Also: if it's a theme related configuration issue, maybe after upgrade some file permissions have been changed.

sudo chmod -R 755 ~/Sites

[kshitij1991]

Thanks please find below :

flush magento cache and flush cache storage - Did, but not worked.

If that won't help, try to clear /tmp directory on server. - Did, but not worked.

Also: if it's a theme related configuration issue, maybe after upgrade some file permissions have been changed.

sudo chmod -R 755 ~/Sites - Can you please tell me where I can find /Sites folder, I am not able to find this folder on file structure.

[kshitij1991]

Please help me on this I have stuck in this from 4 days and in error log I am not able to find anything.