Client has strato hosting - I've tried to install a number of times, tried uploading files again
Error on /setup page:
FATAL ERROR: MODX Setup cannot continue.
Make sure your /xxxx/xxxx/xxx/xx/xxxxxxxx/htdocs/preview/core/cache directory exists and is writable by the PHP process.
I've tried changing permissions (inc. making core/cache 777) but nothing seems to work. Rest of permissions should be the usual 755 / 644.
Contact Strato hosting support a couple of times which has been pretty much useless to date.
First:
http://bobsguides.com/modx-friendly-hosts.html.
Second: 755 is probably correct. It could be an issue with the ownership of the directory rather than its permission setting.
It's worth a try. I wouldn't use a host that didn't provide decent webmaster tools, or accept a client with a site on such a host, but I understand that sometimes you get stuck.