Hi Amnon,
The slug of custom tab types that you have created have improper slug. Please change it, and the problem will be resolved.
You can find information about slug settings in the plugin documentation, in “What can be the slug of tab types?” section here:
http://webshoplogic.com/product/woocommerce-custom-tabs-pro-plugin/#tab-faq
You can find additional details about it at the last post of this thread:
https://wordpress.org/support/topic/printf-functionprintf-too-few-arguments-in-class-wp-editorphp-on-line-233?replies=3
I hope this will help to solve the problem.
Peter Rath
WebshopLogic