Send to Unreal add on from Blender to Unreal Engine 4 not working

It was working fine yesterday, but for some reason now when I try to send something to a clearly open unreal project it say “no instance of unreal editor detected” even tho it is right there open. I know I did the set up correctly because as I said it was working, but now it is not. Any suggestions on how to get it working again?

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