Whenever my server crashes (I am using a 3rd party hosting website) I will see this message in the console every single time. These crashes only happen when 2 or more people are on the server. I am using a 2gb server. I have seen other people with this ambiguity issue, but not a single resolution to this issue.

15.05 18:43:05 [Multicraft] Server shut down (running)
15.05 18:43:05 [Multicraft] Restarting crashed server in 10 seconds
15.05 18:43:05 [Multicraft] Looks like a crash, check the server console. Return value: 137
15.05 18:43:05 [Multicraft] Server stopped
15.05 18:43:15 [Multicraft] Loading server properties
15.05 18:43:15 [Multicraft] Starting server!
15.05 18:43:15 [Multicraft] Loaded config for "Vanilla Minecraft 1.14.1"
15.05 18:43:15 [Multicraft] Updating eula.txt file
15.05 18:43:21 [Server] main/WARN Ambiguity between arguments [teleport, destination] and [teleport, targets] with inputs: [Player, 0123, @e, dd12be42-52a9-4a91-a8a1-11c01849e498]
15.05 18:43:21 [Server] main/WARN Ambiguity between arguments [teleport, location] and [teleport, destination] with inputs: [0.1 -0.5 .9, 0 0 0]
15.05 18:43:21 [Server] main/WARN Ambiguity between arguments [teleport, location] and [teleport, targets] with inputs: [0.1 -0.5 .9, 0 0 0]
15.05 18:43:21 [Server] main/WARN Ambiguity between arguments [teleport, targets] and [teleport, destination] with inputs: [Player, 0123, dd12be42-52a9-4a91-a8a1-11c01849e498]
15.05 18:43:22 [Server] main/WARN Ambiguity between arguments [teleport, targets, location] and [teleport, targets, destination] with inputs: [0.1 -0.5 .9, 0 0 0]
15.05 18:43:22 [Server] Server thread/INFO Starting minecraft server version 1.14.1
15.05 18:43:22 [Server] Server thread/INFO Loading properties
15.05 18:43:22 [Server] Server thread/INFO Default game type: SURVIVAL
15.05 18:43:22 [Server] Server thread/INFO Generating keypair
15.05 18:43:22 [Server] Server thread/INFO Starting Minecraft server on (Server IP).
15.05 18:43:22 [Server] Server thread/INFO Using epoll channel type
15.05 18:43:22 [Server] Server thread/INFO Preparing level "Server Name"
15.05 18:43:23 [Server] Server thread/INFO Reloading ResourceManager: Default
15.05 18:43:23 [Server] Server thread/INFO Loaded 6 recipes
15.05 18:43:25 [Server] Server thread/INFO Loaded 811 advancements
15.05 18:43:28 [Server] Server thread/INFO Preparing start region for dimension minecraft:overworld
15.05 18:43:28 [Server] Server-Worker-1/INFO Preparing spawn area: 0%
15.05 18:43:29 [Server] Server-Worker-4/INFO Preparing spawn area: 0%
15.05 18:43:29 [Server] Server-Worker-2/INFO Preparing spawn area: 0%
15.05 18:43:30 [Server] Server-Worker-2/INFO Preparing spawn area: 0%
15.05 18:43:30 [Server] Server-Worker-3/INFO Preparing spawn area: 0%
15.05 18:43:31 [Server] Server-Worker-5/INFO Preparing spawn area: 0%
15.05 18:43:31 [Server] Server-Worker-2/INFO Preparing spawn area: 13%
15.05 18:43:32 [Server] Server-Worker-2/INFO Preparing spawn area: 13%
15.05 18:43:32 [Server] Server-Worker-7/INFO Preparing spawn area: 34%
15.05 18:43:33 [Server] Server-Worker-2/INFO Preparing spawn area: 48%
15.05 18:43:33 [Server] Server-Worker-7/INFO Preparing spawn area: 90%
15.05 18:43:34 [Server] Server thread/INFO Time elapsed: 5977 ms
15.05 18:43:34 [Server] Startup Done (11.636s)! For help, type "help"