On a computer, connect to your router with an Ethernet cable if you can.
⬢ Still seeing the error? Turn off IPv6
Honeygain doesn't support IPv6, so switching your connection to IPv4 often helps:
Device
Where to change it
Windows
Control Panel → Network and Sharing Center → Change adapter settings → right-click your adapter → Properties → untick Internet Protocol Version 6 (TCP/IPv6) → OK
Android (mobile data)
Settings → Connections → Mobile networks → Access Point Names → your provider → set APN protocol and APN roaming protocol to IPv4
⬢ Change your DNS settings
If IPv4 didn't help, try a different DNS server:
Device
How to change it
Windows
Control Panel → Network and Sharing Center → Change adapter settings → your adapter → Properties → Internet Protocol Version 4 (TCP/IPv4) → Properties → Use the following DNS server addresses. Enter the addresses shown below.
Android
Install the 1.1.1.1 app from Google Play. It changes your DNS settings for you.
⬢ On Windows: clear the app data
Sign out, quit Honeygain, delete the Honeygain folder in %localappdata% and reinstall the app. See the step-by-step guide.
Using a very old Android version, such as Android 4.4? It isn't supported. Check the requirements.