I like to live on the edge and keep my mods up to date. Angel's Smelting 0.6.12 broke the modpack. This one is a fairly simple fix if you want to patch it yourself rather than wait for the next official update.

File to modify:

angelssmelting_0.6.12.zip\angelssmelting_0.6.12\prototypes\override\smelting-override-glass.lua

Change lines 114 and 115 from:

OV.add_unlock("angels-glass-smelting-3", "angels-glass-fiber-board")
OV.add_prereq("advanced-electronics-2", "angels-glass-smelting-3")

To:

OV.add_unlock("angels-glass-smelting-2", "angels-glass-fiber-board")
OV.add_prereq("advanced-electronics-2", "angels-glass-smelting-2")

Thanks friend, this got me up and running again :)

a better solution is to change these lines into (prevents posible breaks with other mod-packs):

if mods["SeaBlock"] then
    OV.add_unlock("angels-glass-smelting-2", "angels-glass-fiber-board")
    OV.add_prereq("advanced-electronics-2", "angels-glass-smelting-2")
else

    OV.add_unlock("angels-glass-smelting-3", "angels-glass-fiber-board")
    OV.add_prereq("advanced-electronics-2", "angels-glass-smelting-3")
end

thanks for finding the culprit.

No, my change is needed even if SeaBlock isn't enabled. It will be included in the next version Angel's Smelting. Happy to help :-)

My change has been released with the latest version of Angel's Smelting. However there was a change to Angel's Petrochemical Processing has broken Sea Block again. (Missing icon liquid-multi-phase-oil.png)

I've made a small helper mod to patch this and another minor Sea Block bug. https://mods.factorio.com/mod/kiwihawksseablockpatch

Edit: Posted this in the wrong place and don't see a delete, just edit.