Forget this, I was running an old WP version. I've upgraded and it's alright now
I installed the plugin both on XF and WP, and the bridge works perfectly.
The Xpress theme doesn't work though, I keep getting this warning:
An exception occurred: [Error] Call to undefined...
Is there a way to put the ads code in the tread_view template (I mean the one included in the bdcache_amp_thread_view (<xen:include template="thread_view" />)? I'd have to put an if condition "if amp", does it exist/work?
If I put the code like this the ad will appear only on top of the thread...