He correctly updated version 3.0.2 to 3.1.0-1, it was done correctly, I can correctly visualize the content of the magazine, however in the administration part, in the section of hosted journals, without being shown, it remains loaded, attached to the image.
As with your other posts, I suspect there is a more concrete error message logged in your PHP error log. Check to there for more information.
Public Knowledge Project Team
I thank you for the prompt response, I was able to solve it, I did it by adding a new test magazine