This Mod calls for some generic Wood item that does not exist. Not sure when this mod was created but it seems to predate some changes to ME. I have only had ME for about a week so not sure where the 'wood' came from. There is another mod for wagon wheels that has the same problem and can be fixed the same way.

This mod can be fixed. This is going to seem complicated and long but it really only takes a couple of minutes if you have the right software. I would install Notepad++ if you don't have it. It's free just Googlebox it.

Here is how to fix the mod:

Using a zip utility like 7-zip, open the mod folder. It can be found under AppData\Roaming\MedievalEngineers\Mods

If you have multiple mods and you are not sure which is the Door/Window one, open each one in 7-zip and open the data folder. One of the SBC's in the data folder will be called doors. The other is in another language, but I am sure it says windows. This is the correct .sbm file.

Once you know you have the right one, extract the contents of the entire .sbm not just the data
folder.

Create a new folder in the mods directory. Rename the folder something menaingful such as Fixed_Windows_Doors

Copy all of the extracted files into the newly created folder.

Open the new folder and open the data folder. Using an editor like Notepad++ (Recommended because it is free and notates xml files) open the first of the two .sbc files. You will have to right click and open with.

In that file you will have to find every instance where it says wood and replace it with Timber10. I believe there are 3 instances. You have the opportnity here to set it to whatever length you want. For the doors I stuck with Timber10 (no spaces!!!). A couple of lines below each of the lines you just modified you will see a critical component call and it will say Stone. Replace all of these stone references with whatever you used for the first replacement. In my case Timber10. These must be the same.

Save the file

Repeat with the other .sbc file for the windows. For mine I used Timber5 (no spaces!!!) for the windows. It made sense to use less wood for the windows. Make sure you remember to change the stone ones as well. I think there are two instances of this. Do a search or find to make sure you catch them all.

Save the file.

The reason we stick all of this in a new folder is because if you recreate the .sbm file which is possible, ME will keep overwriting it with a new download everytime you load the game. By moving everything to a new folder you have created a completely new mod that is not connected to the workshop and this won't happen.

Mods do not have to be .sbm files in case you are curious.

When you load the game or start a new game, you will want to remove the old broken mod and add your new fixed mod.

It is much easier than it sounds once you do it!!!

Good Luck.