Error/warning messages during scrapping

[wioch]

Scrap is now completed, but on terminal window, I noticed following messages:

Downloading 27423 Posts ----------------------------------------  40% An error occurred: Próba połączenia nie powiodł                                                                     onym okresie czasu lub utworzone połączenie nie
Downloading 27423 Posts ----------------------------------------  60%ns.com:443) An error occurred: Próba połączenia nie powiodł                                                                     onym okresie czasu lub utworzone połączenie nie
ns.com:443)

Roughly translated to: Connection attempt failed in specified time or created connection did not... ...ns.com:443 suggest the OF.

and Downloading 27423 Posts ---------------------------------------- 99%Media was null

There are no other logs available. What could be the reason of those two and how to troubleshoot them ?

Enhancement suggestion: Add more logging (to separate file) from scrapping process.