Remove sitename in browser tab

Hi guys,

I’ve tried several things to leave out the sitename in the browser tab, but nothing seems to work. Some details:

– My site is build on the Codeus template.
– I’m using the Yoast SEO plugin.
– I’ve tried to remove %%sitename%% in “Title’s and meta’s”, but no result.

Anyone who can help me fix this? It’s about the website https://www.sommetmedia.nl.

Thanks in advance.