notifications_custom.module = warning: Invalid argument supplied [...] on line 118

Hi,

enabling the notifications_custom.module returns the following error message for me:

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warning: Invalid argument supplied for foreach() in notifications_custom\notifications_custom.module on line 118
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I enabled only the Custom subscription module (6.x-2.0-beta2).

With respect to Messagin/Notifications, I have the following modules enabled:
* Messaging (6.x-2.1): Messaging module, Messaging PHPMailer module.
* Notfifications (6.x-2.1): Notifications module, Content Notifications module, Notifications Autosubscribe module, Notifications UI module, Taxonomy Notifications module.

My Notification module settings are as follows:
Under the content subscription settings, I have the following settings enabled:
Active notification types: enabled for each content type seperatly (with different settings).
Tag-notifications: enabled for 2 of 4 vocabularies.
Under the UI settings I enabled the visible subscription types for threads only. The user account pages I enabled the 'Tag' setting under 'Manage own subscription'.

If the module works, I would allow the setup of 'compulsory' subscriptions and, even more helpful, the 'allocation' of typical notifications to users. - GREAT!

However, to fix the bug, I'd appreciate your help.

Best regards,

Felix