Can't confirm at all.
Installed 4.0.1 - without problems.
Uninstalled it.
Installed 4.0.0 - without problems.
Uninstalled it.
Installed 3.1.3.1 - withour problems.
Upgraded to 4.0.0 - without problems.
Upgraded to 4.0.1 - without problems.
Uninstalled it.
Everything works fine. Maybe there is problem with Marketplace installing?
Without plugin, no.
It's a group setting:
/* Can the member report content? */
if ( $member->group['g_can_report'] != '1' AND !\in_array( \get_class( $this ), explode( ',', $member->group['g_can_report'] ) ) )
{
return 'no_module_permission';
}