I am not being able to add an attachment to the trello card in which I am a member...It is showing this error.
Please assist
Hi Tatan! It happens to me too sometimes. Try to reload the page and also to clear your browser cache, it should work.
Remember that with a FREE account you can attach files up to 10MB, for larger files (up to 250MB) you need Trello Business Class. More info here.
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