The error below is displayed when adding extensions on a workbook in web authoring mode:
Error: "Extensions are not allowed on this site. Contact your server administrator to change this site setting to allow extensions."
There was only one site- Default. However, the site level setting -"Let users run extensions on this site" is disabled for this Default site. We won’t be able to enable it as there is only one site and site level setting is not shown for the Default site.
001475252

We use three kinds of cookies on our websites: required, functional, and advertising. You can choose whether functional and advertising cookies apply. Click on the different cookie categories to find out more about each category and to change the default settings.
Privacy Statement
Required cookies are necessary for basic website functionality. Some examples include: session cookies needed to transmit the website, authentication cookies, and security cookies.
Functional cookies enhance functions, performance, and services on the website. Some examples include: cookies used to analyze site traffic, cookies used for market research, and cookies used to display advertising that is not directed to a particular individual.
Advertising cookies track activity across websites in order to understand a viewer’s interests, and direct them specific marketing. Some examples include: cookies used for remarketing, or interest-based advertising.