During the configuration of Prusa Connect on the Original Prusa MINI/+, MK4, MK3.9, MK3.5 or XL an error on this configuration can occur and the printer shows the message "Registration to Prusa Connect failed due to: ~". In place of ~, a text with more details is shown, from the list below. Depending on the specific shown text, there are different causes and fixes.
Error name: Connect Registration Failed
Error code: #12401 (MINI), #13401 (MK4), #21401 (MK3.9), #23401 (MK3.5), #17401 (XL)
The printer wasn't able to resolve the hostname of the Prusa Connect server into an IP address. The hostname is a unique label assigned to a device connected to a network.
It's not possible to reach the server on the network level, hence it is not possible to establish a TCP connection. The system is either not answering at all or actively refuses the connection.
This message points to an error doing a SSL/TLS handshake. This handshake is the process to create a safe and encrypted connection.
The server claims that the printer is not authorized. The printer is not recognized as an Original Prusa.
The server is returning a 500 Internal Server Error or similar. The issue is on the Connect side, and is expected to be fixed on its own.
This error is caused by an issue related to the printer firmware.
Similar to the Refused error, but the connection dropped after it was initialized.
The response from the server is not recognized.
Ensure that the printer is connected to the internet. In case of a static (non-DHCP) connection, ensure the correct settings are there, or test a DHCP connection. Also, check the .ini configuration file, and in case, rewrite the file.
If the previous steps didn't fix the issue, attempt a factory reset.
Reattempt the Connect registration, after the printer is connected to the internet for a few more minutes.
If the previous step didn't fix the issue, double-check your network firewall. Some firewalls will need for the NTP server to be allowed manually. The specific steps will depend on your specific firewall, we recommend checking your firewall documentation.
If your printer is not an Original Prusa printer, it cannot use our Prusa Connect service.
In case your printer is an Original Prusa, re-flash or update its firmware.
A server error indicates an issue from our side. The issue will be fixed on its own, try registering again to Prusa Connect later.
Re-flash or update the printer firmware. If this does not solve the issue, take note if the printer might have other issues, even if not directly related.
Ensure that your internet connection is stable and not glitchy. To confirm whether an inconsistent internet connection caused the issue, test another connection, if available, such as a hotspot from your mobile phone.
Ensure that the printer is running our latest firmware version. If it is running an old version, update the firmware. Also, check the .ini configuration file, and in case, rewrite the file.