Exception in thread "main" java.lang.IllegalArgumentException: no JSON input found

[nicholak]

I'm getting this error for all Thunderbird mail folders I have. This occurs after the labels JSON is printed to stdout:

Exception in thread "main" java.lang.IllegalArgumentException: no JSON input found at com.google.common.base.Preconditions.checkArgument(Preconditions.java:145) at com.google.api.client.util.Preconditions.checkArgument(Preconditions.java:47) at com.google.api.client.json.JsonParser.startParsing(JsonParser.java:215) at com.google.api.client.json.JsonParser.parse(JsonParser.java:358) at com.google.api.client.json.JsonParser.parse(JsonParser.java:335) at com.google.api.client.json.JsonObjectParser.parseAndClose(JsonObjectParser.java:79) at com.google.api.client.json.JsonObjectParser.parseAndClose(JsonObjectParser.java:73) at com.google.api.client.googleapis.batch.BatchUnparsedResponse.getParsedDataClass(BatchUnparsedResponse.java:223) at com.google.api.client.googleapis.batch.BatchUnparsedResponse.parseAndCallback(BatchUnparsedResponse.java:184) at com.google.api.client.googleapis.batch.BatchUnparsedResponse.parseNextResponse(BatchUnparsedResponse.java:149) at com.google.api.client.googleapis.batch.BatchRequest.execute(BatchRequest.java:269) at to.lean.tools.gmail.importer.gmail.Mailbox.mapMessageIds(Mailbox.java:134) at to.lean.tools.gmail.importer.gmail.GmailSyncer.sync(GmailSyncer.java:66) at to.lean.tools.gmail.importer.Importer.importMail(Importer.java:108) at to.lean.tools.gmail.importer.Importer.main(Importer.java:76)
Update: remove my debugging, compile and run so that the line numbers make sense.