Hello Beatriz,
By publication, do you mean importing?
Could you check if you have checked all necessary options when exporting? From what I can see in the error, you didn't get all required data from the liferay installation you're exporting from .. For ex. When exporting you have the option "show more", which allows you to select options regarding the web content, and maybe regarding your problem : embedded assets? I have no idea if those are the same assets, though ..
If not in the export, maybe you have some properties defined regarding assets in your portal-ext.properties?
Please provide more details on the exact steps you've taken when encountering the error.
Best regards,
Roderick.
Be kell jelentkezni ahhoz, hogy ez helytelenként legyen megjelölve.