buttons on the toolbar disappeared

If none of these suggestions work, uninstall Photoshop and install an earlier version, 25.1.2 for example.

https://helpx.adobe.com/download-install/using/install-previous-version.html Hopefully this guide is in Russian.

я это уже делал,не помагает

First, Try Restarting your PC. Seems obviously simple, but if you have not  done so in a while, errors can accumulate.

Hopefully your graphics card meets specs, and drivers are up to date. Check to be sure.

https://helpx.adobe.com/photoshop/kb/photoshop-cc-gpu-card-faq.html

If the GPU checks out, Save your Workspace and Reset your Photoshop Preferences:

Window > Workspace > New Workspace  If you have already saved your Workspace, you use Reset Workspace to recover it after resetting preferences.

How to reset Photoshop Preferences:

https://helpx.adobe.com/photoshop/using/preferences.html

in the future, to find the best place to post your message, use the list here, https://community.adobe.com/

p.s. i don't think the adobe website, and forums in particular, are easy to navigate, so don't spend a lot of time searching that forum list. do your best and we'll move the post (like this one has already been moved) if it helps you get responses.

<"moved from cc desktop bugs">