It would look like this:
It occurs to me that get player controller would always just say player controller 0, but that’s fine to check it prints that correctly too anyway.
Also, it has to be tick, not begin play. Begin play will show nothing because it fires before possess does sometimes.
Anyway, the point is that the two strings should match exactly (they should both say it is player controller 0 ).
If they don’t match exactly or if only one color string prints out, then you know possession isn’t occurring.
Make absolutely sure you change the color on one of them so you know which string is printing what (or if it is even printing at all).