Problem with export/import XWiki

Hi,

I’m trying to export the contents of a jetty-hsqldb 9.11.2 version and import it to a tomcat / apache / postgres 11.10.10 version.

The 11.10.10 reads the xar file, shows me the pages but systematically refuses to process it in one block with an error message that does not provide any exploitable information.he 11.10.10 reads the xar file, shows me the pages but systematically refuses to treat them with an error

Is that a known issue. What can I do ?

Any error during import is supposed to end up in the application server log, could you take a look ?