Recently updated my code to IMGUI V1.5, and have been getting numerous errors within imgui.cpp, most either being a lack of match for ImVec2 operator or IM_PLACEMENT_NEW not being declared in scope.

All of these errors exist within imgui.cpp on various lines. Running IMGUI V1.5 w/ SFML bindings on a Raspberry Pi. Has anyone else encountered similar issues when updating their code?