Character/Entire Rig Disappears

This has been happening to me for a while. It first started when I downloaded the rain rig file. Everything was fine for a bit but soon I realized she was missing some textures. I did the whole find missing files, but she was still missing some textures. So when I did this once more her FK controls disappeared, and not only that but I had to deleted and redownload her so many times because the entire rig and mesh would disappear out of nowhere. And now this is happening again with a ball rig that I downloaded from the blender cloud site. I don’t know why this is happening but I believe this is only affecting the rigs I download from blender as I made my own rig and that has not been deleted or has disappeared. Sorry that this is so long but I hope there is a way to fix this. Thank you everyone for your time, and please do tell what may be happening here. Thank you.

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