What is the ruling on the money I received from Al Ahli Bank prizes through investment certificates, knowing that I previously received fatwas permitting it and used it to establish a project, but then later read about the prohibition of this type of prize?

If the ninety thousand is not part of your capital and you are able to obtain it, then dispose of the entire amount by spending it on the welfare of Muslims, as it is unlawful wealth. However, if the amount includes your capital, or if you are unable to obtain it, then take your capital amount and dispose of the remainder by spending it on the welfare of Muslims, and the profits generated from this amount are yours.