I have the News and Newsletter plugin there but I can't create a campaign on the backend. It gives me this error

exception 'Symfony\Component\Debug\Exception\FatalErrorException' with message 'Class 'Responsiv\Campaign\Models\SubscriberList' not found' in /home/styleclo/robertson/plugins/indikator/popup/models/Campaigns.php:70

Stack trace:

#0 {main}

I Do not have the campaign manager plugin and will not be installing it due to it being expensive.

Any Idea what's going on?

I fixed this issue. Please update the plugin.

i still get the error

exception 'Symfony\Component\Debug\Exception\FatalErrorException' with message 'Class 'Responsiv\Campaign\Models\SubscriberList' not found' in /home/styleclo/robertson/plugins/indikator/popup/models/Campaigns.php:72
Stack trace:
#0 {main}

I fixed it by pointing it to the Indikator.News plugins.

I fixed this issue. Please update the plugin.