[Guide] Ripping models from Sketchfab

Guys, what should I do with this error?

https://sun9-44.userapi.com/impg/utqPLad...type=album

I watched the video tutorial, and never went to ask somewhere, I tried to squeeze the most out of the lesson, and through a lot of mental torment I managed to download 3 main files, which seem to be any model that is on Sketchfab, namely "file.osgjs, model_file.bin, model_file_wireframe.bin ", but when I started completing the last stage in the video tutorial, after correcting the OSGJS file in a text editor, namely, directly importing this file itself, nothing loads for me, but an error appears, help how to solve it, and then, probably, any person could finally unmistakably use the video tutorial to completely successfully pull any model out of Sketchfab. It is desirable that any person does this only for himself.