FISHING_MANAGER global variable was removed (was often used for Interaction Manager access to the "interactions tuff below the reticle/crosshair) as the global for that one was missing in the past).
-> Accordig to ZOs you can use INTERACTIVE_WHEEL_MANAGER as a replacement!
Lua Code:
SecurePostHook(FISHING_MANAGER or INTERACTIVE_WHEEL_MANAGER, "StartInteraction", OnStartInteraction)