Yes, the message came up when I set up wordpress multi user in my vds :
Problem in wp-config.php – $base is set to BASE when it should be the path like “/” or “/blogs/”! Please fix it!
till I realize that error caused by my common practice in installing wordpress :
rename wp-config-sample.php into wp-config.php
this is BAD.
Solution for this case :
delete all files dan re-upload
don’t touch any file, just point your browser to index.php file dan you’re in the right track bro 🙂