with AEM 6.4 everything works fine, after installation of the service pack 2 i cannot edit tags anymore.
If i right click a tag and choose 'edit' the browser tries to load
instead of something like
Everything else like new, delete and count usage works fine...
I can reproduce this behaviour on a clean AEM 6.4 installation with the 6.4.2 upgrade package.
Thank you for your help
Seems it is a product bug I think you can raise a daycare ticket on this or check any permissions got overridden