I have been swapping between Xbox and windows 10 via realms as this is the only way I can get addons onto my world and have experienced this error many times.
It appears that for me at least, it is directly linked to addon conflicts. This includes store bought texture packs - Faithful seems to have corrupted zombie piglins & piglin textures which breaks the upload. However, removing faithful it works fine.
This also includes certain addons uploading from PC - this however appears to be random. I have had one addon cause no conflicts on many uploads, now however it appears that it is. The addon has not been updated, so for this one at least I am not sure why it is now causing an issue.
Mr P Grycuik
I have been swapping between Xbox and windows 10 via realms as this is the only way I can get addons onto my world and have experienced this error many times.
It appears that for me at least, it is directly linked to addon conflicts. This includes store bought texture packs - Faithful seems to have corrupted zombie piglins & piglin textures which breaks the upload. However, removing faithful it works fine.
This also includes certain addons uploading from PC - this however appears to be random. I have had one addon cause no conflicts on many uploads, now however it appears that it is. The addon has not been updated, so for this one at least I am not sure why it is now causing an issue.