products images stopped to be visible in admin

Hi There,
 I am sorry for not getting your points. It would be awesome if you can possibly include URL of your site and a screenshot with detailed explanation. I am happy to help you out.
Best Regards,
Ziven.

Hi There,
It worked now. http://prntscr.com/gkx7f5 just go to admin and clean the cache. Now it fine.
Best Regards,
Ziven.

Hi There,
Regards screenshot you send via email. I will need to check more details. Please share the FTP account and URL I will detect more details. Also please do sent question to the email we do not support via email. Please post right here with the private mode. 
Best Regards,
Ziven.

Hi There,
Sorry about delayed the message. We tried to fix but. we need more time to resolve. Please give us more time to see details We will get back to you soon.
Best Regards,
Ziven.

Hi there,

Products images stopped to be visible in admin but always visible in frontend.
Any idea and help will be welcome

I have just checked your site via FTP and see the root issue was because most of folders/files in your web root had wrong owner (web user). You can see this for reference: http://i.prntscr.com/rZ5gxyzJTZqMlxwen8gj0w.png
To solve that issue, kindly contact your Hosting provider to suggest the correct owner of all folders/files in your web root at: /httpdocs
Then clean Magento cache after apply changes.
And tell me know how it goes.
Regards,
Mall.