I had this same error with v1.11.4. In my case, the error was not related to the message displayed. I had specified the name of a world in the server.properties file (level-name=My World). When I removed the level-name line from my config, the server ran without problem.
I'm running this in a docker image and on further inspection, I noticed that the folder names mapped through from my Windows machine had extra single quotes surrounding the folder names. I have to investigate further as to why this is happening, but is probably related to Docker itself.
Ross Knudsen
I had this same error with v1.11.4. In my case, the error was not related to the message displayed. I had specified the name of a world in the
server.propertiesfile (level-name=My World). When I removed thelevel-nameline from my config, the server ran without problem.I'm running this in a docker image and on further inspection, I noticed that the folder names mapped through from my Windows machine had extra single quotes surrounding the folder names. I have to investigate further as to why this is happening, but is probably related to Docker itself.