Our assumption is that we have an automated process that is accessing a non-Lightning page and terminating Lightning, reverting us back to Classic.
We are a nonprofit (NPSP) Enterprise Org, and have completed the Lightning Experience Migration Assistant steps including an initially successful Preview.
Check Readiness is clean for VisualForce
For standard Admin profile, we've confirmed that Lightning Experience User is checked - and can successfully "Turn it On" and enable Lightning. We can work in Lightning for several minutes, to up to 30 minutes, before it displays a msg (below) and reverts to Classic.
This also happens in the Preview, after successfully navigating for over 30 minutes, before it too responded with the following msg in a box in an otherwise empty screen:
Thanks in advance for your coaching!
5 answers
Hi Jay,
I would suggest to refer the debug logs for the user experiencing this error, it may help the troubleshooting get a good direction.