Greetings!
About your project:
There were some huge changes in the rendering pipeline from 4.19 to 4.23 (Epic Games basically rewrote a lot of code so they could support Ray Tracing properly), so there's a lot of places to check before actually telling what is happening or not. Anyway, it should take around 1 day of work so I can check and fix everything.
One thing that I should ask is for using the Milestone method instead of the hourly based one because it's safer for you (since you only pay after you get proof of work) and also is easier to measure. If you do that, I would charge you 60 USD for the entire fix.
About us:
We are a couple which consists of a programmer and a level designer. We got picked as preferred freelancers because of our UE4 and Unity reviews and we are sure that we can do a great job for you.
Final words:
Please take some time to look at our portfolio and profile page, we are sure that we can do a great job for you.
About pricing and everything else, please contact us so we can forge a deal that works for both parties.
Thanks for your attention,
Rafael and Monique