Error When Importing Patch

I'm receiving the following error when importing a patch from dev to test and I'm unsure of its meaning:
Expression evaluation error : [valid:false,syntaxError:false,value:Expression evaluation error: An error occurred while executing a save: org.elasticsearch.client.transport.NoNodeAvailableException: None of the configured nodes are available: []]

Has anyone seen this before?

OriginalPostID-231071

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