I'm having similar issues trying to upload Seraphim from the Blood of Zeus anime. Problem is I've cleared the description entirely, changed his name (From Seraphim Periander to literally Prince Zeus, and the family name is just "BoZ" and it STILL won't let me upload him). Sounds like EA has a weird hatred of great anime characters.
You can make babies with other sims, start a homosexual relationship with one, suck their freaking blood, but god help you if you try to upload a completely benign recreation of a anime character, lol.
Seriously though, for those of us who are builders (of both sims and sim-homes) more so than players, most of the fun of TS4 is the joy of creating and sharing those creations through the gallery. My "niche" if you will, is creating sims based on video games, films/tv, and real life -- and making them as close to identical to the real thing as I can -- using no CC or mods whatsoever. This often results in me spending hours upon hours trying to get every, single, detail just right. I've never had any trouble uploading before, and I've uploaded characters from Apex Legends (CC-free Crypto was a struggle, but he turned out great in the end!) and Cyberpunk 2077 with zero issue whatsoever. In this instance, I literally re-rolled him a random name, removed the description entirely, and just used "BoZ" as the title/name on the Gallery. Still nothing. I can't imagine what the issue is as I've removed every instance of anything that could possibly be seen as inappropriate. His name has now been randomized completely so it can't be that. Is his save file just cursed or is a dude named "Prince Zeus" with a blank description and the family name "BoZ" just too inappropriate for EA's lily-white sensibilities?
No, I do not use any CC or mods, and I can't, because I play on console. So this is definitely looking like an issue on EA's end. Shocker. How did we get here? In TS1 you could literally order a dancer who comes out of a cake scantily clad and does a "sensual" dance for the sims on the lot (there were ""dancers"" of both genders, too!). But now I can't even upload a completely appropriate creation for seemingly zero reason because the words "Prince" "Zeus" and "BoZ" have somehow triggered the word filter??? Ridiculous.
TS1 had an expansion pack called Hot Date that was rated T for Teen. But now, 21 years later, everything's gotta be E for everyone? Kinda seems like we're going backwards, no? Kinda seems like they don't at all care about the quality of the game or even the satisfaction of its playerbase. They only care about making everything squeaky-clean so they can market it to kids, when The Sims franchise was never envisioned as a "kids" game. Wish they'd just take the L (well, the T, rather) and focus on making a game so good everyone wants to buy it, instead of focusing on inserting microtransactions everywhere they can & scrubbing away every last bit of character that made this game the amazing franchise it once was.
Sad times. Also, for the record, I tried uploading with "PlasmaOfZeus" but even that won't let me upload. TF?