LayOut 2020.2 has a new issue that we are aware of and working on fixing, where it fails to cope with a document that is missing some of the linked elements in the document, and that leads to a crash. Previous versions were able to cope ok, which means that you may have been working on documents that had missing linked files without knowing about it.
The problem is being worked on, and should be fixed in an upcoming update to LayOut. For the moment the only solution is to open the document in an older version of LayOut. If the document is a 2019 or earlier one, and you still have LayOut 2019 installed, work on the document in that version. If you still have the installer for SketchUp 2020.1, your options are different on Mac and Windows:
On Mac you can go into Applications and rename the SketchUp 2020 folder, to SketchUp 2020.2 for example. That will allow you to work in 2020.2 on any other documents that don’t cause LayOut to crash. Then, run the SketchUp 2020.1 installer, which will create a fresh SketchUp 2020 folder in Applications. Use the copy of LayOut in that new folder when working on documents that show the issue.
On Windows there can only be one version of SketchUp 2020. To reinstall SketchUp 2020.1.1, first use the Add & Remove Programs control panel to uninstall the existing SketchUp 2020.2 version, then run the SketchUp 2020.1.1 installer.
In both cases your extensions, custom materials, components, and templates, will still be there.
If you don’t still have the 2020.1 Mac installer, or 2020.1.1 Windows installer, you can download them from these links:
Mac 2020.1: https://bit.ly/sumac20_1
Windows 2020.1.1: https://bit.ly/suwin20_1_1