When I drag and drop a PDF into a card from my computer I get a message saying "Change not saved: failed to sync with the trello server". I tried attaching from my Ipad and the card shows an attachment but when I try to open attachment on Ipad it just opens up a screen with the file name and document size, if I try to open the document on laptop it gets stuck in "loading preview". I have searched the help community and not seeing any answers. Any help greatly appreciated.
