Hello,

Correct, the above solution should fix the problem.

however, if the problem persists, please let us know.

Best regards,  Adam From MDB

I've contacted the support-team and they told me, that this issue is solved now.

You have to log out (if you are still logged in) and log back in - after that, you should be able to use design blocks & all the pro features that come with your license.

I've had to log in on the snippet page (Access restricted), too. After that the snippet is shown.

I have the same issue and opened a topic for that yesterday.

mdb-5-pro-unable-to-use-design-blocks-error-unauthorized