After adding a new redirect and try it I get the following message:
Unknown Protocol
Opera was unable to open the link since no application associated with "t3://page?uid=97:" protocol was found on your system.
It seems my_redirects isn't converting the t3://page to a readable path. When I replace the code with the actual path the redirect works.
I can confirm this. It works on some installations while on others it does not (same server, php 7.1). Both have TYPO3 8, my_redirects 3.4.1, can't find a difference in configuration.
After adding a new redirect and try it I get the following message: Unknown Protocol Opera was unable to open the link since no application associated with "t3://page?uid=97:" protocol was found on your system.
It seems my_redirects isn't converting the t3://page to a readable path. When I replace the code with the actual path the redirect works.
my_redirect: 3.4.1 realurl: 2.2.1 typo3: 8.7.9