Can you share some additional info on installed versions and OS Orion is running on?
I´m currently patching our install to be fully up2date.
Will get back if the problem persists.
To answer your question: we had Serion 12.0 installed and nta 4.2 (so not very far back).
To follow up my last message: everything is fully up2date: the problem still exists and is quite annoying.
So after installing all actual updates and several restarts of the server - solarwinds don´t work anymore.
If your system is down, raise a case with SolarWinds.
Your original issue is highly likely to be related to a resource on your page pulling back data which is not valid. I would check if other pages load OK and if they do, copy the original home page and remove resources one by one until you find the problematic one. However, with the system being down, highlight this to the support engineer who gets your Orion up and running again.