[17:49:02] [Server thread/WARN]: Failed to load operators list:
java.io.FileNotFoundException: ops.json (No such file or directory)
at java.io.FileInputStream.open0(Native Method) ~[?:1.8.0_121]
at java.io.FileInputStream.open(FileInputStream.java:195) ~[?:1.8.0_121]
at java.io.FileInputStream.<init>(FileInputStream.java:138) ~[?:1.8.0_121]
at com.google.common.io.Files.newReader(Files.java:86) ~[minecraft_server.1.11.2.jar:?]
at mx.g(SourceFile:136) ~[minecraft_server.1.11.2.jar:?]
at lg.A(SourceFile:107) [minecraft_server.1.11.2.jar:?]
at lg.<init>(SourceFile:29) [minecraft_server.1.11.2.jar:?]
at lh.j(SourceFile:186) [minecraft_server.1.11.2.jar:?]
at net.minecraft.server.MinecraftServer.run(SourceFile:436) [minecraft_server.1.11.2.jar:?]
at java.lang.Thread.run(Thread.java:745) [?:1.8.0_121]
It just needs to be there. Details for you soonish.