Hi,
if you want to download the historical version Sonarqube Community 10.5.1
via Download Previous SonarQube Versions
you’ll get the latest 10.6.0 instead.
For 10.4 the link is correct.
Workaround is to use the direct link https://binaries.sonarsource.com/Distribution/sonarqube/sonarqube-10.5.1.90531.zip
Gilbert