Anyone else getting the annoying warning about the unsupported Ext JS library on every screen? It's only happening in our sandbox account. Is there a setting to turn it off?

pretty sure this is related to the drag n drop bundle, you can just undeploy it from the base record type which remove it from everything... if you DO need it on certain records add them back individually

We got the same. It should be auto managed and upgrade?

i wasn't going to sit around and wait for that so i just undeployed it 😄 ¯\_(ツ)_/¯