I'm getting an error when attempting to load up the mod:

Failed to load mods: SeaBlock/data updates.lua:21:attempt to index field 'alloy processing 1' (a nil value)

My mod list:

Factorio 0.15.34
Angel's Bio Processing 0.4.1
Angel's Petrochem 0.5.15
Angel's Refining 0.7.26
Bob's Electronics 0.15.3
Bob's Functions Library 0.15.8
Sea Block 0.1.7

Am I missing something?

Bob's Metals, Chemicals and Intermediates. You are also gonna need Bob's Logistics if you don't have it. Those are the 2 unlisted but required dependencies.

Thank you Cruus, I had this same issue. I downloaded the missing mods you listed and was able to start a SeaBlock map.

Another thanks here. I have been trying sea block for the first time and couldn't get it to load with the required dependencies all installed.

These should be added to the list as it won't run without them.

I have a question... I have this error :
SeaBlock/data-updates.lua:698: attempt to index field 'hydrogen' (a nil value)
I don't understand why ...

yes its almost the same here
data-updates.lua 684: attempt to index field 'hydrogen' (a nil value)

the same here, at line 697

Requires Bob's Metals, Chemicals and Intermediates as a dependency.

Same here. Solved by adding those 2 mods. I'm about to start my first seablock map. Thanks!!