Rewite error |

Hello, activating the Masteriyo plugin going to pages the following error appears at the top:
Warning: Attempt to read property “roles” on bool in /home/customer/www/ on line 91
Going to the courses page you can see the course but if I click on “Start couse” it doesn’t find the page.
The url it points to is of the type:

The page I need help with: [log in to see the link]


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