Posts pagination stopped working

I have about 40 posts displaying 8 to a page, for 5 extended pages on my site and it worked fine for the last month, as I set it up and added posts. All of a sudden, the automatic pagination at the bottom has stopped working and it won't advance any other page at all. I did not change any of the settings. This seems to have broken from an update or some other incompatibility issue. Can you advise? The page is https://nucleationcapital.com/links/ Thanks very much!