Theme font not displaying

Good morning,

On my website fasol.nl something is wrong with my theme. Long story short:
The theme is Baskerville that I use by means of a child theme.
On the displayed website, however, all titles are displayed in a standard font (Arial apparently) instead of the font that Baskerville prescribes. I suspect that there is some css lying around somewhere that prevents this. However, I cannot find what is causing the error.

To see the difference: check the titles here https://www.fasol.nl/blog/ and compare with this: https://www.drukkerswerkplaats.nl/ (that is a website that also uses Baskerville and where the font is displayed correctly).
Can anyone please explain me where this goes wrong?

Thanks,

Peter

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