I imported the .unitypackage you sent me and now I have this error when I try to add a Responsive Container component:
NullReferenceException: Object reference not set to an instance of an object
Exoa.Responsive.ResponsiveContainer.CalculateSpaceBetweenItemsY (System.Boolean includeMargins, System.Boolean includeSpacing, System.Single& totalFlexiblePercent, System.Single& minContainerHeightNeeded) (at Assets/_Game/Tools/ResponsiveUI/Scripts/ResponsiveContainer.cs:670)
Exoa.Responsive.ResponsiveContainer.Update () (at Assets/_Game/Tools/ResponsiveUI/Scripts/ResponsiveContainer.cs:135)
It seems to be the same.
To add further details:
I used ReponsiveUI on my project until last summer. It was working fine (at least no error).
Then I worked on server code and didn't touch Unity until recently. Before working on a new UI again, I updated Responsive UI because my version was still the same since I purchased it in the first half of 2022.
It is since the update I have this issue. Because I use this asset in the same manner than before and I didn't have this error before. If I'm not mistaken, my ResponsiveUI version was the "original" one, from January 2022.
As I said in my first post maybe I'm doing something wrong. But I added the responsive container to a GameObject (in my UI Canvas) which didn't have any children GameObject yet. I also tried adding it to a GameObject which already had children GameObjects. The error pops up either way.
I hope this is enough information for you to help solve the issue.
For now I stopped using ResponsiveUI in new UIs, but still use it in scenes already done with it. They doesn't throw errors and according to tests it seems to work so I don't touch them.
All this to say that I'm not in a rush so if you need time to solve this issue it doesn't matter to me.