help me with Load image failed unsopported format: UNKNOWN suddenly with every upload.#3169

My friends and I are playing an RPG using TTS. Yesterday, we were preparing the maps for today’s session, and all the images the host uploaded are showing up just fine for me, but not for our other friend who joined today. Also, the new images the host is uploading aren’t showing up for me either now; they just appear as blank squares.
(All custom assets are on .jpg)