Category removing error. Ajax doesn't work.

[Anthony69]

I'm trying to remove category using admin panel. Path sell->catalog->categories. Then I clicking actions->remove on some category. Panel shows me form with actions for child products. Regardless of my choice after clicking on the button Remove nothing happens. I went to the browser console and noticed that when clicking on this button an error occurs: Uncaught TypeError: Cannot read property 'replace' of undefined (file category.bundle.js?1.7.6.4 raw 49)  at HTMLButtonElement.<anonymous> (category.bundle.js?1.7.6.4:49) at HTMLDivElement.dispatch (main.bundle.js:253) at HTMLDivElement._.handle (main.bundle.js:253). I myself could not figure out the code and solve this problem. What can this be connected with?

PS: Sorry for my English.