stadium.zip (322.4 KB)
It seems to be a bug in filename handling of the Collada exporter. I was able to manually export the texture image (right-click → Export texture image) and then edit the .dae file to bend the filepaths to point to the exported images.
The creator of the SketchUp model imported jpg images that were ending with “.dds” without an appended “.jpg” extension. This is perfectly legitimate considering that file extensions form a part of the file name and are purely a convention, the actual file type is uniquely specified by either mime-type in the file header or magic bytes. Unfortunately a lot of softwares (especially on Windows) rely only on the ending of a filename and try to infer the file type from it.