Up to 23.0.11.85 unveiled an unfortunate assertion inside Safepay renderer process. The browser itself does not crash, but attempting to navigate to certain pages may lead to "Webpage error" displayed. The error originates in a recent Chrome change.
A fix was released in 22nd February 2019 (the product version remained the same AFAIK).
To verify if you have the fix, navigate to the installation folder usually (C:\Program Files\Bitdefender ..), find the libcef.dll file, right-click on it and check properties.
If the File version says 2019.71.3578.0128 (or 2019.71.3578.128), it is the one having the bug.
If the File version says 2019.71.3578.0220 (or 2019.71.3578.220), it is the one fixed.