Unable to Delete Layouts in Mosaic 2.8.1

Issue

Programmers may encounter an issue when attempting to delete a layout in Mosaic 2.8.1.

When attempting to delete the a layout in Mosaic 2.8.1, users may see the following error.
This error prevents the deletion of the layout.

Layout Error.png

Layouts can be hidden my clicking on the "X" in layout tab title.

Layout Close.png

At this time, there is no other workaround. This issue will be resolved in Mosaic 2.8.2, planned for release in July of 2021.