A few things here.
1 - You need to link the next-page link selector to the right arrow, not each number.
2 - Don't click Multiple
3 - Make is recursive (make it a child to it's self)
4- Create an element selector (tick multiple) Make (make it a child to ROOT & your Next-Page Link)
5 - all your fields you want to scrape goes inside element selector
Here is an example, fill in the fields you want
{"_id":"forum-help-amazon-oaginat","startUrl":["https://aws.amazon.com/marketplace/search"],"selectors":[{"id":"Change Pages","type":"SelectorLink","parentSelectors":["_root","Change Pages"],"selector":"div.row:nth-of-type(1) li.next a","multiple":false,"delay":0},{"id":"Element Select","type":"SelectorElement","parentSelectors":["_root","Change Pages"],"selector":"article.row","multiple":true,"delay":0},{"id":"Title","type":"SelectorText","parentSelectors":["Element Select"],"selector":"h1.col-xs-12 a","multiple":false,"regex":"","delay":0},{"id":"Link-into-service","type":"SelectorLink","parentSelectors":["Element Select"],"selector":"h1.col-xs-12 a","multiple":false,"delay":0},{"id":"price","type":"SelectorText","parentSelectors":["Link-into-service"],"selector":"div.typical-pricing-summary p._2Fzp_IinQrmpcM8hNeqcHb","multiple":false,"regex":"","delay":0},{"id":"Product overview","type":"SelectorText","parentSelectors":["Link-into-service"],"selector":"article.col-xs-6 > p","multiple":false,"regex":"","delay":0}]}