Web viewer site loading problem

In the application that I developed App Inventor, I made an arrangement so that the user can directly enter the website associated with this application through the web viewer, but the web viewer does not open in my website application and it seems that it is constantly being loaded. The same website works fine in the google mobile app. I need help on the causes of this situation and how I can fix it.

You will need to share your relevant blocks, and the url you are trying to reach.