Export to Word does not work in Master/Detail, when i enable the extension ooxml version 15(export to .docx). It seems to work fine when i export without extension, in the old format (.doc).
I have the PHPMaker 2022 version 11 (latest with template updated).In practice exporting starts, but it never ends.
You probably have PHP error, you may check HTTP response to find the actual error message.