Problems displaying characters in place of others

[Phil85]

Good evening everyone

I just realized that copermine on my website instead of certain accented letters in particular replaces them with others that mean nothing
For example: Les Pyrénées by Les Pyrénées
This is just one example of many similar faults.
I don't know what's going on, the update to copermine 1.6.25 dates from a few days after its release and the problem has been going on for a few days I think.
The link to the site.
If you have an idea?
The character set is in Unicode UTF 8, I deleted the cookies but nothing works, and problem only on the copermine part.
thank you for your help

Philippe

[Phil85]

Good morning to everyone
Problem solved by following the instructions here