There does not appear to be anything wrong for any of the Trello accounts I've got access to.
There was an incident yesterday that took Trello offline for a lot of us, and very slow/unusable for others, but it was fixed.
So I suspect the problem is local to your Trello space or something on your computer or network.
Are other people at your organisation having problems? Have you tried another browser?
Hello Community! My name is Brittany Joiner and I am a Trello enthusiast and Atlassian Community Leader. I'll be sharing with you a series of videos with my top tips on how to best use Trello...
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