Many Steam users are facing issues where they are unable to add games to their cart in their account. No matter what they try, even restarting the software can fix the issue. If you are one of those who are facing this problem, here is how to fix the issue: can’t add to cart in Steam.
STEAM PENDING TRANSACTION ERROR SOLUTION (TUTORIAL) |Steam Store Checkout
To resolve the add to cart issue in Steam, please try the following solutions:
Conducting your transaction through the official Steam website is a quick and easy solution to this problem. This issue seems to be limited to the Steam app, which is very common. As a result, you can view the official Steam website using any browser. Simply place the order you want after logging into Steam. We recommend using a secure browser.
It is possible that the Steam servers are currently offline, but this is very unusual. You can check this by contacting Steam Customer Support. They will explain why you are having this problem and why it is happening. If the servers are really down, unfortunately there is nothing you can do but wait. The good news is that the server will be up and running again within a few hours.