Impossible to open any of the creative cloud app on the desktop

Make sure your computer meets the minimum requirements. Most Creative Cloud apps work on these systems, no more than 2 versions back:

• Windows 11 (64-bit) versions 24H2, 23H2; Windows 10 versions 22H2, 21H2;
• MacOS 15 (Sequoia), 14.7 (Sonoma), 13.6.7 (Ventura)

- https://helpx.adobe.com/creative-cloud/system-requirements.html

in additon to @Ben107584 M 's suggestion, make sure your default browser is updated and not opera.

Have you tried this KB article: https://helpx.adobe.com/download-install/kb/unable-to-reach-adobe-servers.html .