Yes, I've talked to the hosting provider.
I first contacted them because of the
Warning: is_writable(): open_basedir restriction in effect.
error message. They said:
File(/) is not within the allowed path
You seem to be trying to access the root of the webserver. Have you properly filled out the configurations required? It's not looking for any file, but rather the root of the webserver, which will not be readable.
The settings simply are incorrect. WordPress is trying to access /, which is not expected to have access. You've missed a configuration step somewhere, as it's attempting to write to /; it'd certainly seem a blank value was given.
The next email was this:
/** Sets up WordPress vars and included files. */
This requires an absolute path; you'd left it (or specified) just with "wp-settings.php" so it attempted to access /wp-settings.php which naturally does not exist.
Any luck now?
That's when the first error message popped up. I changed the ABSPATH back to the original and now I'm back at step one.
The provider seems to think it's an installation issue and suggest I reinstall WP, which I did to no effect.