Bug - AdminACL: Wrong fallback for ACL keys level 3 variable

[stefanhaerter]

Environment

• Server OS: -
• Browser: -
• Znuny version: -

Expected behavior

Admin screen for editing ACLs loads without error.

Actual behavior

When loading the screen, an internal server error occurs (derived from testing in OTOBO).

How to reproduce

Steps to reproduce the behavior:

1. Go to the system configuration
2. Search for 'ACLKeysLevel3'
3. Disable all found settings and deploy the changes
4. Navigate to AdminACL
5. Try to add a new ACL or edit an existing one

Additional information

If the understanding of the Znuny code is correct, you are also affected by a minor bug reported by me in RotherOSS/otobo#4059. Relevant code:

Znuny/Kernel/Modules/AdminACL.pm

Lines 791 to 797 in 7f7219e

	# get list of all possible actions
	my @PossibleActionsList;
	my $ACLKeysLevel3Actions = $ConfigObject->Get('ACLKeysLevel3::Actions') || [];
	for my $Key ( sort keys %{$ACLKeysLevel3Actions} ) {
	push @PossibleActionsList, @{ $ACLKeysLevel3Actions->{$Key} };
	}

The cause of problem is that an array ref is used as fallback for the ACLKeysLevel3 variable when instead it should be a hash ref.