Error with:
File not found: angelspetrochem/graphics/icons/liquid-multi-phase-oil.png

it seems it is in prototypes/recipe.lua at 110

I can confirm i just updated Angels mod and seablock wont load anymore.

I've made a small helper mod to patch this and another minor Sea Block bug. Install this and everything will start working fine! Just until Trainwreck releases an official fix.

https://mods.factorio.com/mod/kiwihawksseablockpatch

Is "another minor Sea Block bug" the wood > coal > charcoal recipes? Because that's the main power source for my factory.

Yup. I listed it under the changelog. Coal and crushed coal aren't supposed to exist in Seablock. Tranwreck removed them and coke a few versions back, replacing with charcoal and carbon. Bob added a new recipe that brought them back.

You can still go from wood to charcoal via cellulose fibre.

Working fine! Thank you KikiHawk

Quick question, I want to start playing seablock but I see that the last supported version is 0.18. That means that I should revert to that patch to be able to play or is it functional in 1.0/1.1?

It is fully functional in 1.0, as long as you add in my patch mod
https://mods.factorio.com/mod/kiwihawksseablockpatch

Fixed in 0.5.0