Hi BlackCrow,
Greetings of the day.
Thanks for your message.
I am working on version 8.0 testing, I see there is an update in the Symfony framework therefore small error.
https://build.prestashop-project.org/news/prestashop-8-0-0-available/
I see it works fine on debug mode when visiting module pages from the back office and disabling debug mode after some time.
Attached screenshot for your reference.
Have a nice day.
Best Regards,