I have tried to clean the KML and restructure as well and adding the full XPATH to the "featureId" field and none of it worked for me with the KMZ file I have.
I'll accept your answer as there are probably other people that need to restructure the KML for it to work.
... View more
Hi,
I just encountered the same issue. In my case the header of a lookup had some special characters like "à". Removing those characters from the header and doing a debug refresh solved the issue.
The complex part is to identify which lookup has the wrong header.
... View more