引用自 arkngt：

When I try to buy trading cards I suddenly have to confirm it via mail, which hasn’t been the case before. But it doesn’t work. I open the mail, confirm the action by clicking Yes, which opens a steam page which says Thanks for the confirmation - but then nothing happens. When I go back to the steam client, I still get the Confirm via email to complete the purchase window, so I’m back at square one without any actual purchase being made. No idea what else I can do.

引用自 nian：

引用自 arkngt：

When I try to buy trading cards I suddenly have to confirm it via mail, which hasn’t been the case before. But it doesn’t work. I open the mail, confirm the action by clicking Yes, which opens a steam page which says Thanks for the confirmation - but then nothing happens. When I go back to the steam client, I still get the Confirm via email to complete the purchase window, so I’m back at square one without any actual purchase being made. No idea what else I can do.

The confirmation doesn't work if you originally tried to purchase multiple cards at once.

Try to buy a single card on the market, then the confirmation should complete without issues.

After that, you should be able to buy multiple cards again without any issues.