Failed to load mods: Error in assignID, technology with name electric-energy-accumulators-1 does not exist.

Source: electric-energy-accumulators-2 (technology).

Mods to be disabled:
- Advanced-Solar

Yep same here, after game load all my solar was gone. Make backup

Having the same problem

Latest patch changed the name of the accumulators, mod needs to be updated:
https://steamcommunity.com/games/427520/announcements/detail/1726475446418490504

Pretty easy fix, you can do the surgery yourself if you are so inclined (no guarantees, etc etc):

$ git diff
diff --git a/prototypes/technology/technology.lua b/prototypes/technology/technology.lua
index 04bb742..f62ea0f 100644
--- a/prototypes/technology/technology.lua
+++ b/prototypes/technology/technology.lua
@@ -13,7 +13,7 @@ localised_name = {"technology-name.electric-energy-accumulators-2"},
recipe = "advanced-accumulator"
}
},
- prerequisites = {"electric-energy-accumulators-1"},
+ prerequisites = {"electric-energy-accumulators"},
unit =
{
count = 200,

To further explain trippyd's post:

• Go to the Factorio mod folder. Mine is C:\Users[username]\AppData\Roaming\Factorio\Mods
• In there will be an "Advanced-Solar_1.1.0.zip" file. Expand it.
• In the expanded folder, go "Advanced-Solar_1.1.0\prototypes\technology\ and open "technology.lua"
• Make a new line 9 and add << recipe="advanced-accumulator", >> (without the << >>, but with the "" )
• On line (now 17), remove the "-1" from the prerequisites.
• Back out and re-zip the Advanced-Solar_1.1.0 folder. You'll have to get rid of the old one, as THERE CAN BE ONLY ONE.

@quasipickle Thanks for that. It saved my game

There is a tempmod that does this for you - https://mods.factorio.com/mod/TempFixAdvancedSolar

Thanks eselpungen!

@quasipickle no need to re-zip since folders take priority over archives

Forever later, fixed.