After your "Fix" it says always i want to sleep..
My fix has
nothing to do with your energy level problem. In fact there are no energy level manipulations in the script.rpy, that is the only file I changed, you can read it yourself.
My fix just introduces all variables to the game
once and
before the game actually starts or an old save gets loaded. Originally they were initialized, as many developers seem to write their code, right
after you hit the start button and the game starts from the beginning. With this kind of code structure, when the dev adds new variables there and you try to continue your game from an old save, those new variables will be just unknown to the game and it will throw an error when it tries to check the value of an unknown variable.
With the fix the game won't crash if you try to continue it from an old save, but it may not work correctly if any of the variables are supposed to be greater than their original value at that point in the game.
I don't remember quite well, was there an energy management system in the previous version of the game or not. Maybe it was the mod that removed it as it was an annoyance, since I kind of remember it being there at one time, but not being an annoyance later when I played it with the mod.
In case your old save is from the modded version without the energy management, it just starts at 0 level, just as mine did.
In any case, you can get over your little chronic sleepyness problem by opening the dev console (Shift+o) and setting your energy level manually to 100:
energy=100
You can repeat it at any time in the game when the level is low and you want to do something that requires energy.
Now I just changed the initial energy level from 0 to 100, so you won't be sleepy when you try to continue with an old save from the modded game without energy management. It will drop normally when you do things that require energy, just as in a newly started game or with a manually set energy level.