Can't export App in stable (but preview works)

Hi, my app won’t export with the 7.0 stable release.
I get the error:

“Compilation failed: Error: Object is no Spread<Observable>!”

When I ignore compile errors, the export is successful, but the app silently crashes immediately after starting.

With preview 7.0-569 I get no compile errors and everything exports and executes fine.

Before exporting, is there an error in the Debug window (Build Result tab) or is it really only on export?

Also keep in mind that preview and stable versions use different nuget package folders. Could it be that you simply need to re-install some packages? Like Sebastian said, have a look at the Debug window first, it should tell if packages are missing or if there are any other errors due to different versions of a package in preview and stable.

TLDR: Problem solved by copying nugets.

Alright, there acutally were some build errors even before exporting and I fixed those. So the export was going smoothly but the app still crashed silently right after being started.
The preview build export still worked. So now I copied all the nugets from the preview folder to the stable release folder and now everything works as expected.
Not sure what was the issue here, it seems maybe some outdated nuget was picked up, but no idea which one and what the error really was…