Hi Jaime,
Thank you for your response.
Are you running the latest “WooCommerce Memberships” premium plugin? I have just tried on 3 fresh WordPress Installations and I can replicate the error.
I have installed the default Twenty Seventeen theme with WooCommerce(Version 3.4.3), WooCommerce Memberships(Version 1.10.4), Event Tickets(Version 4.7.4.1 ), Event Tickets Plus(Version 4.7.4), The Events Calendar(Version 4.6.19 ), The Events Calendar PRO (version 4.4.28.) plugins.
My client has pay for The Events Calendar PRO, Event Tickets Plus and now he can’t update the plugin(The Events Calendar PRO) to the latest version because of this error, this is not really good his paying for the license and he can’t get the latest version of the plugin.
Thank you,
Nuno