I want to extract some information from the tajawal website, but unfortunately I faced this issue.
You need to indicate on the correct pattern to extract the fields/data.
Watch this and try accordingly
Like while selecting the elements, please select in order
like if u need to select the price, select the first row price and then after that select the second one
Try inspecting the webpage and understand how that page is built and how data is presented in that blocks/sections. This will help you understand what elements you need to select to create a pattern.
If you are doing scraping correctly and still is showing this error, then the page might not be segregated in structured classes/container(rare scenario). Then you might need to build your own sets of rule to extract information from a entire screen scraped data.