Print body of http error as well

js/modules/loki_message_api.js

@@ -209,6 +209,8 @@ class LokiMessageAPI {
           successiveFailures += 1;
         } else if (e instanceof textsecure.HTTPError) {
           // TODO: Handle working connection but error response
+          const body = await e.response.text();
+          log.warn('HTTPError body:', body);
           successiveFailures += 1;
         } else {
           successiveFailures += 1;