Menu won’t open

Hi everybody,

I am really not sure where to post my topic, so sorry if I did it in the wrong part of the forum. The thing is that I don’t know if my problem is coming from WordPress, a plugin or my theme (Galatia).

Last week I updated wordpress and some plugins and yesterday a friend told me my menu wasn’t opening anymore. So I tried to see from where it could come from, but impossible to find anything.

I tried to unable the plugins, delete the cache, checked things on my theme, opening it on several browser, etc… but nothing. Also, following a checking list on a forum I got these infos:

jquery-migrate.min.js?ver=3.3.2:2 JQMIGRATE: Migrate is installed, version 3.3.2

DevTools failed to load SourceMap: Could not load content for https://benoit-pillet.com/wp-content/plugins/galatia-core/post-types/portfolio/shortcodes/horizontaly-scrolling-portfolio-list/assets/js/plugins/hammer.min.js.map: HTTP error: status code 404, net::ERR_HTTP_RESPONSE_CODE_FAILURE

I have really basic knowledge on coding, etc… So I did what I could but I am now feeling a bit lost. Does anyone know what could be the issue and how to fix it?

Thank you in advance for helping!

The page I need help with: [log in to see the link]