I have this problem when using xCustomListView and XUI Views together.
I have tried with both xCustomListView v1.67 built-in and also v1.68 (downloaded from this forum thread).
I am using xCustomListView to build a custom cardview list while XUI Views to use the ColorTemplate color picker dialog.
XUI Views version is v2.00, copied to the internal library folder.
Make sure that there is no CustomListView module in your project.
If it doesn't help then remove the existing lstpromo view from the layout and create a new one.