When using the path id for tenant or perhaps installed Perfex in subfolder, you might sometimes experience 403 Forbidden apache page when accessing some file uploads; most especially, when the upload file name contain white space or characters encoded i.e %20
To get this resolved, we suggest updating your root .htaccess file as illustrated below.
Change:
RewriteRule ^(.*)$ index.php?/$1 [L,QSA]
To
RewriteRule ^(.*)$ index.php?/$1 [B,L,QSA]