This product seemed like the perfect plugin for my requirement.
So now, after purchasing it and after a fresh installation, I've activated the plugin and see the following error message:
Warning: session_start(): Cannot send session cache limiter - headers already sent (output started at /home/onefitpassco/public_html/wp-content/plugins/gym-management/gmgt_function.php:3) in /home/onefitpassco/public_html/wp-content/plugins/gym-management/settings.php on line 52
Why wasn't this release been tested properly before going to production and to the market?
Please deliver a fix ASAP, I have seen more people commenting on this issue.