Have some error like this while executing saxon-he-12.3.jar file

[elaa0505]

Error
SEPM0004 When 'standalone' or 'doctype-system' is specified, the document must be
well-formed; but this document contains a top-level text node
When 'standalone' or 'doctype-system' is specified, the document must be well-formed; but this document contains a top-level text node

[gimsieke]

Do you have an input document and an invocation for us so that we can reproduce the issue?