Can't install experimental modules I installed Drupal 8.1.2, but I can't install modules of the category "core (experimental)". No problem with other modules or themes for example. I get no logs and no error message. Hitting the install button just redirects me to the extend page.

I have been able to install Migrate by installing Migrate Plus, which requires Migrate, but this does not solve the issue, in particular not for the other modules in "core (experimental)". Is there anything I have to do to be able to install experimental modules?
There's a core issue for failure to install experimental modules (or, more precisely, modules with parentheses in the group name with Suhosin): https://www.drupal.org/node/2665152