How to question/new sd card

I was using a Rpi3 with a PiAware preloaded sd card.
I decided I wanted to feed another site, along with FA.
I pulled the PiAware sd from the Rpi3, and inserted the other sd card (the one that contains the image for the other feeder site.
When I launch the browser and enter the ip address to see the map, I get the FA page and a message stating that PiAware doesn’t seem to be running.

How can I fix this?

Was that card from an identical RPi3 model?

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Clear browser cache (Ctrl+Shift+Delete), then reload browser (Ctrl+F5).