Just a thought … did you already check
fastboot --version
… as it is mentioned in a Tip.
I guess you double checked the source / download of the dtbo.img which you are using ?
I do notice that https://mirror.math.princeton.edu/pub/lineageos/full/dubai/20230817/ contains files from a Lineage20 build while you are installing Android 12 (S).
Android OS version 10 11 12 13
Android name Q R S T
LineageOS 17 18 19 20
/e/OS build names q r s t
There is an explanation here OnePlus - 9 Pro - lemonadep - Documentation Suggestions - #8 by bofh666 of how you could produce dtbo.img from the ROM you are intending to install.
See also Motorola - edge 30 - dubai - Documentation Suggestions