Web request produced exception (Url: ) in 'UpdateChecker v1.4.2'

Im getting this error on one of my servers.

Web request produced exception (Url: ) in 'UpdateChecker v1.4.2' plugin (ArgumentNullException: Value cannot be null.
Parameter name: requestUriString)
at System.Net.WebRequest.Create (System.String requestUriString) [0x00003] in <ef151b6abb5d474cb2c1cb8906a8b5a4>:0
at Oxide.Core.Libraries.WebRequests+WebRequest.Start () [0x00014] in <c2afd8354b8b4f3ca451cf5a1aa111c3>:0
 
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