FPlayer should be a struct instead of a class. Beyond that, we'd need to see the declarations of all those other non-primitive types. Please show all relevant code in https://pastie.io/ instead of images.
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polar oriole
Also make sure both server and client are using the exact same enums in the exact same order. If they've changed between builds, both have to be rebuilt.
Sidebar: if you keep your enum values below 255 they can be byte instead of int
It should work as it is...it just allocates garbage as a class
Not the default - it's changing between these
LongSword = 700,
Bow = 800,
oh wait - Mirror ignores private fields
maybe make a struct for sending the data, and push the values to the class through an internal method
Just to mention, List<whatever> is sent internally by converting it to an array, so maybe make those lists to be arrays in the struct to begin with to save that overhead