Having the same error but in a different mycred file (freemius.php), still not solved 🙁
Hello @tonygao,
Thanks for contacting us,
I hope you are doing well, We have fixed this issue. Please use the updated plugin on your site and let me know if you still have any issues.
Here is the updated plugin: Download Link.
Thanks & Regards
WP Experts Support Team
The issue is not solved!
We temporary solved the problem by adding the following code to the line 424 of /public_html/wp-content/plugins/mycred/includes/hooks/external/mycred-hook-woocommerce.php
array_key_exists($point_type,$parent_reward_setup) &&
Sorry for the inconvenience, we will add this code in our next release.
Thanks