Plugin not scraping properly

We Tried to get plugin to scrape data, but it only does it periodically, and often stops after 8 records. Please help.  We got it to work a few times, the HTML does not change on the page where it should break. Don't think such a small site has a "blocker" after 8 slow scrapes https://share.getcloudapp.com/JruoYEEy Scraping: https://ww3.northernminer.com/stocktables/byCompany.aspx?filter=w&sort=name See attachment