I'm having this same problem, although on 5.0.3, but I think it might be an issue across ue5 maybe since i have had the same problem on an older version than you. These are the nodes im using and it won't let me connect the multiply to it, although in the youtube tut im watching they seem to do it without an issue. Also im…
So - I can't connect that multiply node to that break Vector 3f node I can pull out of the multiply, ask it for the break and it will place it - but the two nodes will never connect. The same happens if I just make fresh vectors. I can split the vector struct pin on the way out of the multiply so this can be worked around…
the workaround above is fine for new BPs - arguably neater too - i'm just concerned it'll bork older BPs in case you hadn't found it yet - rightclick on the output pin of the multiply node and break the struct