Categories and pictures are not displayed in admin

Good afternoon!

The gallery editing page in the admin panel does not load..
The main page of the component opens.
But when you go to the page of some gallery, the page loads, but categories and pictures are not displayed. None of the buttons work.

ibb.co/nkjNdFQ

At the same time, everything is displayed correctly on the site.

What's wrong?

Thank you.

Hello,
Thank you for contacting us

Send us a link to page with problem.
Send us FTP access and Joomla admin access via our contact form.
support.balbooa.com/contact-us

Regards,
Vyacheslav, Balbooa.com