SUMMARY: The URLs for Data Overview: Properties refer to https://c.wikipedia.org/*, instead of https://wikipedia.org/. I presume, in the past it was pointing to CDN (content delivery network) version of wikipedia which has load balanced across CDNs. It is no longer the case and it should be pointing to https://wikipedia.org/. STEPS TO REPRODUCE 1. Open Kalzium 2. Click on a Element 3. Choose from the tab the Data Overview tab 4. Click on any property (e.g. Melting Point) 5. You will be directed to: https://c.wikipedia.org/wiki/Melting%20Point, for which you get ERR_NAME_NOT_RESOLVED. OBSERVED RESULT Directed to: https://c.wikipedia.org/wiki/Melting%20Point, for which you get ERR_NAME_NOT_RESOLVED. EXPECTED RESULT HTTP 200 and view the page at: https://wikipedia.org/wiki/Melting%20Point SOFTWARE/OS VERSIONS Windows: NA macOS: NA Linux/KDE Plasma: 5.22.4 (available in About System) KDE Plasma Version: 5.22.4 KDE Frameworks Version: 5.84.0 Qt Version: 5.15.2 ADDITIONAL INFORMATION OS: Archlinux kernel: 5.13.5-arch1-1 package: kalzium-21.08.0-1