Just upgraded to version 1.5.6 of the plugin on a very small / basic site and I get the following fatal error when I go to the plugin page:
Status : There was no automatic optimization - Check settings
Scheduled cleaning DISABLED - Check settings
Retention is disabled - Check settings
Fatal error: Call to undefined function wpo_getCurrentDBSize() in /home/mysite/public_html/wp-content/plugins/wp-optimize/wp-optimize-main.php on line 120
This appears straight after upgrade when you go to the plugin page. I have alredy tried uninstalling and reinstalling and the error is the same.
Any thoughts please?