Issues with categories display and search form with tHEME SWATCH

Hi there
We haeve 2 issues with the theme SWATCH and our website ??

When we click on a category, the page doesn’t display the posts and we don’t know why : https://www.pancartes-de-la-honte-pour-chats.com/category/la-tribu-des-miauleurs/

And the other issue is on the form search, you can have it on a post (https://www.pancartes-de-la-honte-pour-chats.com/josephine-2/) on the right in the sidebar, the same, if we want to check a name (for exemple sookie) it doesn’t work .. https://www.pancartes-de-la-honte-pour-chats.com/?s=sookie

Can you help me ?
Here the plugins we have :

404 to Start
Acunetix Secure WordPress
Acunetix WP Security
All In One SEO Pack
Black Studio TinyMCE Widget
Antispam Bee
BruteProtect
Cookie Notice
Google XML Sitemaps
Importateur WordPress
JETPACK par WP
Login LockDown
Redirection
Revolution Slider
Subscribe2
UpdraftPlus – Backup/Restore
Wordfence Security
WP Maintenance
WP Missed Schedule
WP REST API
WP Social Popup and Get Traffic

WP Super Popup
WP-Optimize
WPtouch Mobile Plugin
XCloner

Thank you ! ??