I upgraded an app from Mendix 8.18.1 to Mendix 9.24.15. There where a lot of layout grid issues with column-sizing being -1. I corrected all errors and the app works again. When I imported a new version of a MarketPlace-Module, e.g. Excel Importer, the layout grids used in this new Module are also getting a column-width of -1. What am I missing. So something is still wrong somewhere... I hope someone has had the same experience and fixed this.