When activating the current 0.3.0 plugin an error message is displayed.
Warning: file_get_contents(/code/wp-content/plugins/pantheon-wordpress-edge-integrations-0.3.0/pantheon-wordpress-edge-integrations-0.3.0.php): failed to open stream: No such file or directory in /code/wp-includes/functions.php on line 6620
We discovered that it is looking for the plugin file with the ending "-0.3.0.php" but the actual plugin file is "pantheon-wordpress-edge-integrations.php." Renaming the file fixed the issue and the plugin activates correctly now.