Here is the log error on my site:
Failed loading XML file
/home/jdltropi/public_html/tmp/com_virtuemart_allinone_update/install.xml
XML: Document is empty
XML: Start tag expected, '<' not found
JInstaller: :Install: Cannot find Joomla XML setup file
Invalid package type. The update can not proceed.
Try with aio or without Aio
Best Regards