Unknown error that occurs at each rendering

[siriusxiv]

The following error message is printed in the console at each rendering.

[LSGL] Cannot find a location for texcoord.

I do not know its origin, nor its use. I do not know if it is serious either.

[syoyo]

This is warning and not serious, thus you can safely ignore this message.
(texcoord is required for proper texture mapping, but not required unless you do texture mapping on a scene object)

[siriusxiv]

Understood, then I propose to explicitly write it is a warning using [warning] tag and use a different color (blatant red makes you think it is a critical error).