attempting to reference a deleted function

[lpwwpl]

when compiling, there is a error like:
1>C:\Users\86135\Desktop\BundleFusion-master\external\mLib\include\application-d3d11\D3D11Canvas2D.h(302,1): error C2280: 'ml::D3D11Canvas2D::ElementBillboard::ElementBillboard(const ml::D3D11Canvas2D::ElementBillboard &)': attempting to reference a deleted function