Getting this same problem using WP 3.0 WordPress Mobile Pack 1.2.3. Also running W3 Total Cache 0.9.0
I found out that the find_folder function in the WP_Filesystem_Base class does not return a value when the root folder of the FTP path is the root location of the site. Therefor the error returned is “fs_no_folder”.
I fixed this my adding a folder within the root FTP location and moving the root location of the web. Then it all worked out.
I think this is a bug that must have come when I upgraded to 2.8.2.
plz fix this in future releases.
I have the same problem for different sites on same server. Same configuration. I Updated one site that had all plugins enabled, no problem. While other sites show me nothing more then “Installation Failed”.
Is there no solution for fixing this?