[BUG] Namespace for DOMXPath missing in MetsDocument

[BFallert]

Description

When I want to save a document in Typo3 BE, I get several error messages. The error message occurs both when I want to save the data record without or with changes.

Each of the two lines is repeated x times:

12 times:
PHP Warning
Core: Error handler (BE): PHP Warning: DOMXPath::evaluate(): Undefined namespace prefix in /var/www/typo3/packages/bfallert/presentation/Classes/Common/MetsDocument.php line 797

6 time:
PHP Warning
Core: Error handler (BE): PHP Warning: DOMXPath::evaluate(): Undefined namespace prefix in /var/www/typo3/packages/bfallert/presentation/Classes/Common/MetsDocument.php line 850

Reproduction

Steps to reproduce the behaviour:

1. Open Typo3-BE
2. Select your "Data-Folder"
3. Select / Click on "List"
4. Scroll down to "Documents"
5. Select a document
6. Click on "edit record"
7. Click on "Save"
8. See the error

Expected Behavior

No error message

Screenshots and Examples

Environment

• OS version: Debian GNU/Linux 11 (bullseye)
• RDBMS version: MySQL 5.5.5-10.5.23-MariaDB-0+deb11u1
• Apache Solr version: 8.11.2
• TYPO3 version: 10.4.38
• PHP version: 7.4.33

Additional Context

Add any other context about the problem here.

[sebastian-meyer]

Did you change any of the pre-defined metadata mappings?

The error suggest that maybe some mapping is missing a mandatory namespace for an element...