When trying to start the engine EU4 get this error, how to solve
fbxsdk-2013.3.dll should be in the same folder as your UE4Editor.exe(the same folder you have pictured). Is that file missing? If you got everything from github, make sure you properly extracted Required_1of2.zip for Unreal Engine 4.01. You can find it here:
If you installed everything from the Unreal Engine Launcher, then you can probably Verify your installation from there.
the error occurs after compiling the source file UE4, do not know if the build is complete or if the missing files because after compiling in VS2013 program there was no error.
This can occur sometimes when you copy over the Required Zip files… The fbxsdk-2013 files are in 1of2 and go in the
…\binaries\win64 dir of the engine source. I had copied them, but then when I switched versions back to 4.1 from head
and I had done a manual clean of the built binaries 
So if the file is missing, just readd the required files and that
should clear it up.
We apologize for the lack of follow up on this issue. Do you have any update on it? Is the problem still occurring for you, or were you able to find a solution?
Definitely please let us know if you were never able to get the editor to run, and we will be glad to discuss our options with you.
We are marking this as “resolved” for tracking purposes, until we hear back from you.
Thanks