Description of problem:
In Help -> Contents or F1, there is a bad link to the webite with the webpage error:
The requested URL /users/evolution/3.28 was not found on this server.
Version-Release number of selected component (if applicable):
The latest verions on the GNOME website is 3.22.2
Steps to Reproduce:
1. Help -> Contents or F1
Bad link to non-existent website.
Good link and help is displayed.
Thanks for a bug report. That's an infrastructure problem , worked around in  (by providing an old version of the documentation). Having installed also evolution-help you'll get local and up-to-date version of the documentation, accurate to your version.
Cannot reproduce with evolution-3.28.5-9.el8
Since the problem described in this bug report should be
resolved in a recent advisory, it has been closed with a
resolution of ERRATA.
For information on the advisory, and where to find the updated
files, follow the link below.
If the solution does not work for you, open a new bug report.