Hi Jacob!
I found this online: https://www.reddit.com/r/playstation/comments/pv2rq7/error_code_su1012655_every_update_file_is_read_as/?rdt=61893
He was able to solve it eventually.
But, I was read somewhere that this issue could be related to bad RAM memory.. The update file is somehow decompressed in the ram before being applied to the SSD. When the RAM memory is bad, it will show the error you are having.
You can find some more info here: https://gbatemp.net/threads/error-su-101265-5-the-update-file-is-corrupted-no-uart-error.652218/
If the ram memory is bad, it will be difficult to fix it, as it is soldered on the motherboard :(.