Card printing fails to open
We have seen a few reports of printing cards (Share > Print...) failing to load. It looks like the issue is related to the Trello desktop applications. For some reason the desktop application can get in the way of the printing process when a powerup is enabled.
The workaround is do use a browser (Chrome, Firefox, Edge, ...) to load your board and print from there. This seems to work for everyone that has run into this issue.