Dynamic height of WKWebView in TableView Controller

Hi, This is my first thread in the forum.
I have created TableView Controller with Cells, which contains only WKWebView control. Data are passed into WKWebView properly,
but height of each row in tableview Controller is each time different.

I have created WKWebView.height constraints connected to TableViewCell.
Unfortunately dynamic height does not work at all and I don’t know why.

My application is stored on GitHub here: https://github.com/phracek/Katechismus_katolicke_cirkve_iOS

Specific Pull Request which should contain dynamic height is here:

Any idea, what I did wrong?