Reports can occasionally fail due to a few different reasons. The search engines sometimes block us from retrieving results, your search location could not be verified or because you do not have enough credits.
We have an automated re-run system which will attempt to re-run any failed reports every 15 minutes. We will attempt this twice, and if your report has not completed successfully at the 3rd attempt we won’t try again. But you can re-run it manually yourself.
Search Engines sometimes block us because they don’t like automated services accessing their servers and using up bandwidth which human searchers could otherwise use. We employ a whole load of techniques to avoid being blocked by search engines and also to minimize the impact on their servers – search engines are our friends!