Regular price can not be smaller than sale price. Although the prices are well prepared

Hello

The extension was working fine. But recently, I can’t save the settings. This message comes to me: Regular price can not be smaller than sale price. Although the prices are well prepared

The add-on works for me on more than one store and this problem appeared in all stores and on different hosts
I tried it on a new store and I see the same message
Please Help

Warm greetings