Your tiki is not properly set up:

The directory '/var/www/html/templates_c' is not writeable by apache.
The directory '/var/www/html/modules/cache' is not writeable by apache.

To set up your tiki, log in to the system running tiki,
and type the following commands:

$ bash
$ cd /var/www/html
$ su -c './setup.sh apache'

or

$ su -c './setup.sh mylogin apache'

Once you have executed these commands, this message will disappear!