XSL-Transformation with xmltype.transform results in ORA-64498 when XSLT references XMLs via HTTP

Hello,

when I try to do an XSL-Transformation with xmltype.transform it results in

ORA-64498: FTP and HTTP access over XDB repository is not allowed on server side

when the stylesheet (XSLT) references XMLs residing on a server via HTTP (e.g. document('http://myserver.at/myXmls/myData.xml'))

This occurs on Oracle 19g.

Is there a way to allow HTTP requests from the DB?

I only found this issue related with DTD validation. There it is stated that the validation should be disabled. This is no option for me - I need the possibility to transform XMLs with XSLTs referencing other XML-files with HTTP in database.