I am also having this issue in a freshly installed 2.8.4:
“The uploaded file could not be moved to C:\Inetpub\vhosts\mfcgc.org\httpdocs/wp-content/uploads/2009/10.”
I have changed permissions to 777 on the xml file itself.
Also changed permissions to 777 on wp-content, uploads, 2009, and 10.
Is the import tool trying to copy the xml file to wp-content/uploads/2009/10? I’ve already put it there using FTP. Maybe I can bypass that part of the Import script, how do I locate it?