This sounds vaguely familiar. So you click the Files & Images tab, then click Create and then you get the error? Or you get the NewFolder folder, change Title, hit Save Folder Name, and then get the error?
Are you running an old version of SS? What does the error say? Does it happen on Localhost and/or your Webserver? Have you tried using multiple browsers? What are the permissions on the Assets folder, mine is set to 755.
Nope - the Silver Stripe is brand new I only installed 2 weeks ago.
I've attached a couple of screen grabs that might help.... so what happens is this:
1 - Click to create new folder
2 - Little error message appears at the bottom of the screen (see screen grab) - no folder is created in the list
3 - Logout
4 - Log back in
5 - Et voila, there are the new folders in the list (see 2nd screen grab).
It is very bizare.
I've tried in IE and in FF and it does the same thing - running on a live website in a sub domain.
Permissions on the assets folder is the same as yours 755.
I looked through old posts and the bug tracker and couldn't find out any more info. I double checked my recent install of 2.3.3 and didn't have any issues (Safari and FF on Mac).
Maybe it's just a bad install. If no one else has any suggestions, then maybe you should re-install. When installing, they say to unzip the SS file on the server. If you copied all the files up there, maybe something went wacky or some other permissions were changed.
I am getting the same "create folder" error with SilverStripe v2.3.6 installed on my XAMPP localhost. I don't get the error when using SS with my online server account. Previous SS versions worked fine in XAMPP. I thought upgrading XAMPP could possibly solve the problem. It made no difference. I've also tried chmod -R 777 to give full read/write permissions to all the files.
Using Director::set_environment_type('dev'); in my config file doesn't give any more error info.
Have you guys tried using getfirebug.com in Firefox to see what the error is? The error happens during an AJAX request - you won't see the error unless you have the console in Firebug open while adding the folder.