Noticing that on some of my files textures brought in from sketch have disappeared recently for example you can see here https://cospac.es/Ghwu the files in the back are missing textures, so I re-uploaded the raven file (its in the front) and it now has them. Was there an update of some kind?
Right now we advise to keep 3D items under 50 MB (including textures). This is both to keep the space performance at a good level and the loading time relatively short.
All new items dragged and dropped into your spaces should be working fine now. The old ones can only be manually replaced, or edited by our developers. Please get in touch with me via PM if you need a space quickly fixed.