Victron energy Venus GX Manual page 63

If a Connection error is shown, the CCGX is not able to contact the VRM database. The connection
error will show an error code that indicates the nature of the connectivity problem. Also, details of the
error message are shown, to facilitate on site IT experts to diagnose the problem.
Error #150 Unexpected response text: A connection succeeded, but the result was incorrect.
This might indicate that a transparent proxy is hijacking the connection. Examples include a
WiFi login page or a cellular providers payment page.
Error #151 Unexpected HTTP Response: A connection succeeded, but the response did not
indicate a successful HTTP result code (normally 200). This might indicate that a transparent
proxy is hijacking the connection. See #150 above for examples.
Error #152 Connection time-out: this could indicate a poor quality internet connection, or a
restrictive firewall.
Error #153 Connection error: this could indicate a routing problem. For details, check the shown
error message:
Error #153 Connection problem, and then specifically an SSL related issue, such as in below
screenshot: check the date and time setting of the Gx Device, and also the time zone. And
check that your router router is not showing a special disclaimer, login or acceptance page, like
often seen in airports, hotels and other public wifi.