I apologize. Note that we have just tested the compatibility with the plugins you will see on this documentation: https://forum.stockmanagementlabs.com/d/2383-atum-compatibility
With the rest we can't make sure it will work properly. So at this point , you have two options:
- Looking for a compatible alternative.
- Using custom development, but as we don't offer this service you will need to hire a developer.
Also, in order to test it on my staging site, I downloaded the Wordfence in my site and I am able to download the PDF's, so maybe there is more than one plugin causing incompatibilities.