I have already reported this issue to the developers of Hybrid Aquatic but got no response just yet.
This mod is incompatible with Hybrid Aquatic (https://modrinth.com/mod/hybrid-aquatic)
I've attached the crash log as a .txt file.
crashlog.txt

Hello, thank you for writing in.
This issue should have been resolved with the latest v1.1.5-1.20.4 updates.
Please feel free to submit another Issue if the problem persists.