Symptoms
Task for importing package to POA 5.5 fails with:
Internal error: TObjectID Plesk::SaaS::ImportPackage(TObjectID) : InfoLinks shall contain a record with the default locale (no xml:lang attribute).
Cause
Incorrect order of <link> nodes.
Resolution
As it described in APS 1.2 specification: for each XML element localizable according to the format requirements, there must be a language neutral entry (i.e. an entry without an xml:lang attribute).
The error message is self-explanatory: please add language tags to infolinks. For example like OX did:
<link class="official" href="http://www.domain.com/">Official site</link>
<link class="official" href="http://www.domain.com/" xml:lang="ja-JP">オフィシャルサイト</link>
Check the line order: the line without xml:lang must be specified firstly.