Hi.
This issue has been reported:
And has been reported in bugzilla:
https://bugzilla.ipfire.org/show_bug.cgi?id=12785
And one workarround is:
At the moment to get things work again properly you only can perform a reboot of the system to get rid of this lock or you manually have to remove the “/tmp/ids_page_locked” file by hand.
Regards.