How do i fix this?

Unsupported Vertex Buffer type COLOR_1
could not assign data to any VertexBuffer type for buffer view 22
Could not find loader for extension KHR_materials_specular
Could not find loader for extension KHR_materials_ior
are the Messages i get how do i fix this issue?

Cut and paste the actual error output including whether those are errors or warnings, any stack traces, etc… Don’t filter the information.

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I am quite sure we support only Color_0.
materials_ior is also not supported by any shader.
not sure about specular.

Those should be warnings however and not errors.