Hello again,
Thanks for the information, I have deactivated all the plugins and changed the structure of the permanent links as you recommended and it works perfectly now.
I am marking the issue as resolved.
Many thanks,
Sisco.
Thank you very much for your reply. Just a detail, the default theme of the website is not TwentyTwenty but TwentyFive. Could this affect the behavior of the TranslatePress plugin?
Thanks again,
Sisco