99.5% of the time this is due to having some kind of Ad-Blocker plugin or Kaspersky installed.
These could be ( but not limited to ):
Total Adblock
uBlock Origin
AdGuard
Adblock Plus
Ghostery
AdLock
Surfshark CleanWeb
NordVPN Threat Protection
Privacy Badger
Malwarebytes Browser Guard
They block our outgoing API calls via Websockets.
Solution: You will need to temporarily turn them off while crawling.