Build Error #2

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[INFO] BUILD FAILURE
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[INFO] Total time:  19:22 min
[INFO] Finished at: 2018-11-23T13:00:12-05:00
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[ERROR] Failed to execute goal on project commandhelper: Could not resolve dependencies for project com.sk89q:commandhelper:jar:3.3.0: Failed to collect dependencies at com.sk89q:worldedit:jar:5.3-SNAPSHOT: Failed to read artifact descriptor for com.sk89q:worldedit:jar:5.3-SNAPSHOT: Could not transfer artifact com.sk89q:worldedit:pom:5.3-SNAPSHOT from/to bukkit-repo (http://repo.bukkit.org/content/groups/public/): repo.bukkit.org: Unknown host repo.bukkit.org -> [Help 1]
[ERROR]
[ERROR] To see the full stack trace of the errors, re-run Maven with the -e switch.
[ERROR] Re-run Maven using the -X switch to enable full debug logging.
[ERROR]
[ERROR] For more information about the errors and possible solutions, please read the following articles:
[ERROR] [Help 1] http://cwiki.apache.org/confluence/display/MAVEN/DependencyResolutionException