Tell us what you are trying to do? Create a content template for a custom post. I get this error when I click "Create template":
Toolset plugins let you design templates for single items (pin pages) without writing PHP. Your templates will include all the fields that you need and your design.
Is there any documentation that you are following? No
I took another check on the issue for you by logging in. I checked your list of plugins and saw that you didn't have our Toolset Blocks/Views plugin installed.
In order to create the content template with our Toolset plugin you will need to have our Blocks/Views plugin installed and activated. Once you've done this you will be able to create the content template.