As its name implies, BdLib Mod 1.12.2/1.10.2/1.7.10 is an essential library mod for the bdew author’s mods to work properly. If you are also using any of these mods of this author, then surely you cannot ignore this library mod.
As mentioned above, this is a support mod so it will not have any effect when the individual installed into Minecraft. The mods that are supported by it usually use the same code structure. So to reduce the file size, save more time, and optimize everything, the author merged this code into this mod. That is the reason why if you do not install this mod before it needs it, it will run and generate an error or failure to load the main menu.
Now you can use the BdLib mod if you have installed Minecraft Forge for your device.
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