I've been unsuccessful in adding a web page to an existing card. I have a Samsung S25 Ultra & just did a software update. I already had the latest version of Trello, but decided to try uninstalling & reinstalling. That checkmark stays grayed out no matter what I do. No issues with signing in to my account. I am administrator of my boards. I've been using Trello for several years & have never had any issues. I took a screenshot, but don't see a way to attach it here. Hope someone can help.