I can't start a Server with the Versions 18w05a, 18w06a, 18w07c, 18w08a and 18w08b.
But it runs with the older Snapshots. Here is the error:

C:\Users\jan\Desktop\Vanilla3(<-My Server)>"C:\Program Files (x86)\Minecraft\runtime\jre-x64\1.8.0_25\bin\java.exe" -Xmx3G -Xms1G -jar minecraft_server.18w08b.jar gui Pause
[18:06:52] [main/WARN]: Ambiguity between arguments [teleport, destination] and [teleport, targets] with inputs: [Player, 0123, @e, dd12be42-52a9-4a91-a8a1-11c01849e498]
[18:06:52] [main/WARN]: Ambiguity between arguments [teleport, location] and [teleport, destination] with inputs: [0.1 -0.5 .9, 0 0 0]
[18:06:52] [main/WARN]: Ambiguity between arguments [teleport, location] and [teleport, targets] with inputs: [0.1 -0.5 .9, 0 0 0]
[18:06:52] [main/WARN]: Ambiguity between arguments [teleport, targets] and [teleport, destination] with inputs: [Player, 0123, dd12be42-52a9-4a91-a8a1-11c01849e498]
[18:06:52] [main/WARN]: Ambiguity between arguments [teleport, targets, location] and [teleport, targets, destination] with inputs: [0.1 -0.5 .9, 0 0 0]
[18:06:52] [main/INFO]: Loaded 0 recipes
[18:06:52] [main/INFO]: Loaded 0 advancements

I don't know why this is happening.
Please fix the Bug in the next Snapshot.