I am getting the error - Fatal error: Call to undefined function get_the_post_thumbnail() in /home/warrior/public_html/wp-content/themes/earth-warrior/page.php on line 18
i removed line 18 to see if it came back but it just came up with the same message but for a different function. The function files in wp-includes i haven't touch and the default themes seem to be working fine so that says that the issue is with my custom theme.
downloaded my custom theme from the ftp and installed it on a local MAMP installation - works perfect...
can someone suggest a course of action/investigation.