Try running it with the 1291 forge files and the bat files from a previous version and dump the mods and configs of this version into it and see if it runs. I forgot to update the bat files on this forge version
Still getting the same error. And the UpdateChecker mod was giving me a lot of trouble, it was stopping the server at this line "Now reading data segment for mismatching mcversion: Minecraft 1.8" I removed it and the server launches, but then it still tells me its an incompatible server.