Thank you for reporting this problem. It seems to be related to the errors with zero-length text spans.
We’ve fixed it already and will push the fix to the next NuGet update.
Thanks, great for the confirmation. So it is probably the same problem that was already fixed.
Just one wish (I think I asked for it some time ago, but I could not convince you to do so ;-)): is there any chance to get a list of changes when a new release is published to Nuget? Maybe an addition to the release notes post at https://www.alternetsoft.com/news/alternet-studio-9-0-released
Then I could check whether a new release on NuGet is worth the work to do the update or not.