Why don’t these sources show up? / why doens’t the mobile menu work?

Hi,

My site-menu doesn’t work on smartphone. I tried a mobile menu plugin, that didn’t help. I asked the theme-makers, they reccomended to de-install the theme but that doesn’t seem like a good idea to me.
Then I ran a mobilefriendly test and although the verdict was that the site should in fact be mobile friendly, it turns out that two ‘pagesources’ cann’t be loaded.

These are the codes:

https://www.socublog.nl/wp-content/themes/minimalistblogger/css/font-awesome.min.css?ver=5.5.1

https://www.socublog.nl/wp-content/uploads/dynamic-mobmenu.css?ver=2.8.1.4

My questions:
– Can this be the reason of my menu-problem?
– What can I do about this and/ore the menu-problem?

I’m curious whether someone can help.

Greetings, Esther

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