KB: Troubleshoot "Error from portal365.altium.com"
Altium Designer
[Why] Troubleshoot popup dialog error "Error from portal365.altium.com" upon launching Altium and attempting to sign-in such as: "Error from portal365.altium.com: The server name could not be resolved" or "Error from portal365.altium.com: The attempt to connect to the server failed" or "Error from portal365.altium.com: A secure channel could not be established" or "Error from portal365.altium.com : Server SSL certificate is invalid [What] Access to Port/URL of Altium license server may be blocked by a particular ISP, proxy server, and/or antivirus/firewall applications. It could also be due to invalid certificate due to proxy server intercepting and replacing it. [How] Check to make sure https://portal365.altium.com can be access with a response 'OK' on your web browser. If not, consult your IT department. Next, click on lock icon next to URL, select 'Connection is secure' to confirm it is issued by Amazon
Solution Details
Here are things to try:1.) PORTS AND ADRESSES
Please have your IT support check that the addresses and ports indicated in this Knowledge Base article are open in your network:
https://www.altium.com/documentation/knowledge-base/url-address-and-port-information
2,) VIRUS PROTECTION AND FIREWALL SETTINGS
Have your IT Support check if antivirus/firewall applications could be stopping necessary network traffic.
3.) OFFLINE INSTALLER
Please do a fresh reinstallation with the offline installer:
https://www.altium.com/documentation/knowledge-base/altium-designer/offline-installer
4.) TRANSPORT LAYER SECURITY
Please confirm that TLS 1.2 is enabled in your system using the following procedure:
Press "Win+I" to launch the Windows Settings panel
Type "Internet Options" in the search bar
Launch the Internet Properties panel (Figure 1)
Click on the Advanced tab
Scroll down to the bottom of the list to find the "Security" section
Confirm "Use TLS 1.2" is enabled (Figure 2)
5.) FOR THIS ERROR
If the issue is reproducible at the same time on a different PC in the same network, look into corporate firewall/router, antivirus, proxy etc. (see #1 above)
If it is local to only one PC, look into local antivirus, DNS, proxy cache etc. (see #2 above) Try to open the URL mentioned in the error (https://portal365.altium.com) in Internet Explorer (or Edge) as Altium Designer and Internet Explorer uses the same functions to access web sites. You should see an OK message. Check if the certificate is OK and valid by clicking on lock icon next to URL, select 'Connection is secure' to confirm it is issued by Amazon.
