Adult content warning plugin

Hi guys,
I’m running an adult site https://www.camabc.com/ (note: it is NSFW)
I’m looking for a plugin that creates a adult content warning when visitors come to my site for the first time.
I’ve tried https://www.ads-software.com/plugins/content-warning-v2/ but it had conflict with iThemes Security (using them both make my site look weird by returning .gz file download whenever I click in any post/page of my site).
Please suggest me some.
Thanks a lot.