Numbers of navigation not working properly

I just noticed the page navigation on my site only goes till 9 but there are a lot more pages. If I add 10, 11, etc at the end of my site it does work. But it just doesnt add any numbers to the navigation bar. I was hoping someone could help me and tell me what I have to do to fix it.

I didn’t code my site myself. But I would like to fix it myself. I looked at the stickied post. But I do not see any coding saying query anywhere,

my website is https://www.rity.nl

https://www.ads-software.com/plugins/wp-pagenavi/