Hello friend, how are you?
I have this problem too:
**** Warning: can't process font stream, loading font by the name.
**** Error reading a content stream. The page may be incomplete.
**** Warning: Form stream has unbalanced q/Q operators (too many q's)
**** File did not complete the page properly and may be damaged.
My Moodle is 3.5.4+.
My unoconv is:
unoconv 0.8.2
platform posix/linux2
python 2.7.5 (default, Mar 26 2019, 22:13:06)
[GCC 4.8.5 20150623 (Red Hat 4.8.5-36)]
LibreOffice 5.3.6.1