Hi Thibault,
Thanks for reaching out.
I have checked your website and found that the Optimize WP plugin has been used to optimize the JS and CSS. I would suggest you deactivate the plugin or disable the optimization once, and check if that helps. If that does not help, there might be some different reasons behind your issue. I would like to suggest troubleshooting the following common issue to help us recognize the reason.
1.Theme Related Issue
2.Plugin Conflict
3.Theme Update related issue
4.CSS/JS Customization
5.Disabling Cache
6.Disabling CDN
If you discover that an issue is coming from a custom code or 3rd third-party plugin, kindly consult with a developer or contact the plugin author. Please note that we do not provide support for custom codes and 3rd party plugins, unless you are subscribed to One. If not subscribed, kindly consult with a developer or contact the plugin author.
Please note that we do not provide support for custom codes and 3rd party plugins, unless you are subscribed to One service.
If none of the above helps, please provide login credentials for your site in a secure note to examine it further, including:
– WordPress Site URL & Login URL
– WordPress Admin username/password
To create a secure note, click the key icon underneath any of your posts.
Please note that we don’t provide any support to the 3rd party plugin or related issues.
Thanks