Failed to load mods: ...trialRevolution3__/port/mods/advanced-fluid-handling.lua:269: attempt to index field '?' (a nil value)
stack traceback:
...trialRevolution3__/port/mods/advanced-fluid-handling.lua:269: in main chunk
[C]: in function 'require'
IndustrialRevolution3/port/updates/mods.lua:909: in main chunk
[C]: in function 'require'
IndustrialRevolution3/data-updates.lua:26: in main chunk

Works fine with advanced fluid handling disabled

This means that AFH has changed some of their prototype names, which I admit I haven't handled very gracefully.

I will not be releasing any more versions of the Patchset for 2.0, and it will be many weeks before the 2.1 version is ready. For now, you can either disable AFH as you already did, or go to Line 913 (the very bottom) of __IndustrialRevolution3__/port/updates/mods.lua and comment out this line

require("port.mods.advanced-fluid-handling")

which will disable my compatibility tweaks, but AFH will still load with all three tiers of its pipes.

EDIT: And thanks for the report, by the way. I'm not looking forward to working on the update, and I can definitely sympathise with why the original mod was left behind. :P