Hi there Cindee!
By default (mostly for reasons relating to search engine optimization) we don’t link outside the populated range of months.
For example, if the earliest event on the calendar was in August 2017 and the furthest-in-the-future is April 2018 then you’ll find that month view won’t automatically let you “leave” that date range: this is entirely by design.
Looking at your upcoming events list, I believe that is exactly what’s happening here. Am I mistaken/do you have any events later than April 2018 – or do you simply wish to enable visitors to browse without any restrictions?
If the latter is what you’re seeking, you may be interested in the following knowledgebase article:
theeventscalendar.com/knowledgebase/add-nextprevious-links
Let me know if that helps/clarifies things!