Detailed page of an event > Page not found

Hi All,

I have a problem with “The Events Calendar”.

I can access to the monthly and list view but when I try to access to the detail of an event I have an error “Page not found”.
I have the same problem if I try to access to the page from the back office : I access to the page in the back end but I have the error when trying to access to the front end.

It was working before.
The only change that I have made is on the table prefix that I have renamed in MySQL.

Any idea ?