Bank account not updating in quickbooks. It takes a long time updating and then says something went wrong

Have you tried opening your QBO account on private/incognito browser?

Hi lobirdliving-gma,

Welcome to Community!  I can understand the benefit of having the ability to upload and match your transactions so you can reconcile your accounts effortlessly is beneficial. However, our QuickBooks Online Development Team were aware of the recent situation causing a break in the connection to several banks over the past few days and this has now been resolved. 

For future reference, here's how to manually upload your transactions when this happens.

Should you require additional assistance for this please contact us.  We'd be happy to work with you directly and get you back to what you love most.

Schedule a Callback or start a Chat: click Help (?) in the upper right in QuickBooks Online > enter "Contact support" > select Contact Us > explain your situation > click Let's Talk > choose Get a callback or Start a Chat.
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I hope you find this to be helpful.  Enjoy the rest of your day!