I try to use Qlik Sense Desktop (3.1 SR4) Rest connector with Zendesk to get all Zendesk users.
But the pagination does not work, I only get the first 100 users.
I've experienced problems with pagination in the 3.1 R4 REST connector, try installing the rest connector off the qlik marketplace and see if it makes it difference.
You can use the custom option and use a loop to walk through the next pages:
Let total = Round(FieldValue('X-Total-Count',1)/100);
Let startAt = 1;
for startAt = 1 to total step
WITH CONNECTION(Url "https://doaj.org/api/v1/search/journals/page=$(startAt)");