Ps4 save not working on ps5

So I tried downloading my diablo 3 ps4 save to my ps5. However it’s not reading the file. Is this because I changed my psn name? If so is there any way to recover my progress on my new name? I have a lot of loot and progress on that save and I’d be devastated if it is lost.

If you changed name then yup; it won’t work. Asking Blizzard Support may help but they are very likely to ask you for Proof of ID and questions about the account to be 109% sure you are you