Hi Zainab,
To me this looks like a permissions error with the W3 Total Cache plugin not being able to write to the mentioned files and directories.
It's asking you to change the permissions, (chmod 777), to 777, which means world readable-writable-executable, on the wp-content/cache/tmp and wp-content/w3tc-config directories.
In other words change the "tmp" and "w3tc-config" directories/folders, which are located inside the wp-content folder/directory, permissions to 777.
Here is a little better break down of the error message you got, just to make it more readable/understandable:
/home/theproph/public_html/wp-content/w3tc-config/master.php could not be created, please run following command:
chmod 777 /home/theproph/public_html/wp-content/cache/tmp
chmod 777 /home/theproph/public_html/wp-content/w3tc-config in /home/theproph/public_html/wp-content/plugins/w3-total-cache/inc/functions/activation.php:127
Stack trace:
- /home/theproph/public_html/wp-content/plugins/w3-total-cache/lib/W3/ConfigWriter.php(159): w3_throw_on_write_error('/home/theproph/...', Array)
- /home/theproph/public_html/wp-content/plugins/w3-total-cache/lib/W3/Config.php(71): W3_ConfigWriter->save()
- /home/theproph/public_html/wp-content/plugins/w3-total-cache/lib/W3/CloudFlare.php(174): W3_Config->save()
- /home/theproph/public_html/wp-content/plugins/w3-total-cache/lib/W3/Plugin/CloudFlare.php(52): W3_CloudFlare->update_ip_ranges()
- /h in /home/theproph/public_html/wp-content/plugins/w3-total-cache/inc/functions/activation.php on line 127
Anyway, I hope this helps.
Rich Williams
DomainMasters.NET
Managed Web Hosting