So, in the original project, the candle flames have no issues, however, when I migrate them into my project, the gallery view of them is fine, but any editor window view shows the flame black.
I may lean into this if I cannot find an answer, however, it would be nice to know why this is happening.
The gallery view is probably just a screenshot ported over from the migration. It doesn’t represent the flame in the current state. Right click it and choose: Asset Actions => Capture Thumbnail. It wil most likely represent the current state of the candle.
The flame and the candle both have bad materials. It’s probably a shader compile error inside of the candle + flame material (perhaps something to do with subsurface scattering).
Try going into these materials and pressing compile and check if an error pops up.