USTRUCT Causes issues with following class

Development Pipeline & Plugins Editor Scripting
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2

First, in 4.11+, GENERATED_BODY() should be used instead of GENERATED_USTRUCT_BODY():

At least as of version 4.11, using
GENERATED_USTRUCT_BODY() will result
in a UHT error stating
GENERATED_BODY() is expected.

https://wiki.unrealengine.com/Structs,_USTRUCTS(),_They’re_Awesome

Another problem is that you mark methods FPlayerLocation(), FPlayerRotator() with UPROPERTY:

UPROPERTY(BlueprintReadOnly)
FVector FPlayerLocation();

So, please change it to a property (from method, as above) and keep it marked with UPROPERTY:

UPROPERTY(BlueprintReadOnly)
FVector PlayerLocation;

Alternatively, if you want a method, you can expose it with UFUNCTION:

UFUNCTION(BlueprintCallable)
FVector GetPlayerLocation() const {
    return this->PlayerLocation;
}

private:
    FVector PlayerLocation;

Finally, if you want to access your USTRUCT from blueprints, add:

USTRUCT(BlueprintType)

So, after those changes, your code should be like this:

USTRUCT(BlueprintType)
struct FLocationStruct 
{
	GENERATED_BODY()

	FLoctationStruct();

	UPROPERTY(BlueprintReadOnly)
	FVector PlayerLocation;

	UPROPERTY(BlueprintReadOnly)
	FRotator PlayerRotator;
};

It is also worth noting, that if you want a struct that contains location and rotation (and scale), FTransform does exactly that.