diff --git a/SlackNet/SlackException.cs b/SlackNet/SlackException.cs
index fdadca3..a8c1c22 100644
--- a/SlackNet/SlackException.cs
+++ b/SlackNet/SlackException.cs
@@ -13,7 +13,9 @@ public class SlackException : Exception
     public SlackException(ErrorResponse errorResponse)
         : base(errorResponse == null
             ? "Slack returned an unknown error response type"
-            : $"Slack returned an error response: {errorResponse.Error}.")
+            : string.Join(Environment.NewLine,
+                new[] { $"Slack returned an error response: {errorResponse.Error}." }
+                    .Concat(errorResponse.ResponseMetadata?.Messages ?? [])))
     {
         ErrorCode = errorResponse?.Error ?? "unknown";
         ErrorMessages = errorResponse?.ResponseMetadata?.Messages.ToList() ?? [];
diff --git a/SlackNet/WebApi/CallsApi.cs b/SlackNet/WebApi/CallsApi.cs
index 1b3de05..9f4aa00 100644
--- a/SlackNet/WebApi/CallsApi.cs
+++ b/SlackNet/WebApi/CallsApi.cs
@@ -14,7 +14,7 @@ public interface ICallsApi
     /// <remarks>See the <a href="https://api.slack.com/methods/calls.add">Slack documentation</a> for more information.</remarks>
     /// <param name="externalUniqueId">An ID supplied by the 3rd-party Call provider. It must be unique across all Calls from that service.</param>
     /// <param name="joinUrl">The URL required for a client to join the Call.</param>
-    /// <param name="createdByUserId">The valid Slack user ID of the user who created this Call. When this method is called with a user token, the <see cref="createdBy"/> parameter is optional and defaults to the authed user of the token. Otherwise, the field is required.</param>
+    /// <param name="createdByUserId">The valid Slack user ID of the user who created this Call. When this method is called with a user token, the <see cref="createdByUserId"/> parameter is optional and defaults to the authed user of the token. Otherwise, the field is required.</param>
     /// <param name="dateStart">Call start time.</param>
     /// <param name="desktopAppJoinUrl">When supplied, available Slack clients will attempt to directly launch the 3rd-party Call with this URL.</param>
     /// <param name="externalDisplayId">An optional, human-readable ID supplied by the 3rd-party Call provider. If supplied, this ID will be displayed in the Call object.</param>