Fail to import a texture

I am a developer. When I try to import the “Ma_Wan_02-02-2026_Model_16_u0_v0_diffuse” texture (8192 x 8192 pixels resolution) for my product “Rainbow Houses - “Ma Wan 1868”, Hong Kong”, it prompt that “Fail to import a texture” and it auto reduce the pixel to 2048 x 2048 (see attached photo), why?