This happened when I tried to teleport and my server crashed and my sysser accused Analyze: login phase does not handle this packet! header 66,
after I've done these steps this problem is over*:
(*I do not know if this is fixing or just hiding the error, but I solved it like this:)
src client: /UserInterface/packet.h:
-search for the syserr header, exemple my 66:
HEADER_CG_SCRIPT_BUTTON = 66,
-src / game: go to end of the input_login.cpp and create a empty case like this:
I hope it solves.