I get a white screen before I want to load any link in webview

Basically I have a card view layout on one screen and a webview on the other. I want to have 1 webview for multiple links. Each time a user clicks a card , a specified url should open in webview. But it’s blank. Please specify a block code for this action that works.

Can you show your blocks?

Show block where you are opening the screen

I have total 3 screens , 1st is the starting screen , screen1 , 2nd one is the card view layout screen screen2 , 3rd one is the webview screen screen4 .The picture is of Screen4 where I want to load the link whenever a user clicks on a card in screen2

can you post your aia?