Update PHP Script using Amazon Affiliate Product Advertising API

A third-party created a PHP script that scrapes the Amazon Affiliate Product Advertising API for details regarding book sales rankings. We recently moved the script to new hosting and it partially works, however there are portions that are still not working. The public portion of the tool can be seen at [login to view URL] Current issues are that the Rankings tab is not updating daily. Also clicking on a title should show a graph which is not loading: [login to view URL] On the Others tab, there the Graph button is also not working: [login to view URL] There is a nightly cron job to run these scripts, and they never fully complete to update the data. Therefore the data updates intermittently, and also appears to only pull the top 500 titles or so (there are 1,285, but the last 785 aren’t pulled). Often the data is stagnant for 3-5 days, and will then update two days in a row, only to wait for another handful of days before refreshing. The files are currently on a DO server managed through Runcloud. I can provide the files themselves, or access to the server and database. Also: we need to upgrade to PA API 5.0 before PA API 4.0 shuts down on March 9, 2020 Click here ([login to view URL]) for more information on PA API 5.0. When you are ready to upgrade to PA API 5.0, please follow BOTH of the two steps below: 1. Migrate your AWS account ([login to view URL]) to a Product Advertising API account, if you have not done so already. 2. After completing step 1, upgrade each of your applications to PA API 5.0, as per the details here ([login to view URL]). Since this relies on specific access to the Amazon Affiliate Product Advertising API, experience with that API is mandatory. Please briefly share your experience with the Amazon Affiliate Product Advertising API.