[MM-45990] log JSON parsing errors in API4 (#20724)

app/plugin_test.go

@@ -453,7 +453,7 @@ func TestGetPluginStatusesDisabled(t *testing.T) {
 
 	_, err := th.App.GetPluginStatuses()
 	require.NotNil(t, err)
-	require.EqualError(t, err, "GetPluginStatuses: Plugins have been disabled. Please check your logs for details., ")
+	require.EqualError(t, err, "GetPluginStatuses: Plugins have been disabled. Please check your logs for details.")
 }
 
 func TestGetPluginStatuses(t *testing.T) {