Something went wrong on the website. Specifically, the Download page for 9.0 [1] shows attributes that should be evaluated, e.g. [define v]9.0.30[end]. That also breaks the download links which do not evaluate the version number properly.
I can look into it tomorrow, but if someone more familiar with recent changes can fix it that would be great. Also, migrating the source to Git would be very helpful since if it were in Git I could have looked into it now. SVN is a bit more challenging for me ATM. Thank you, Igal [1] https://tomcat.apache.org/download-90