Im using phpbb and would like to activate facebook login on my site. However when I am trying to register my website on the facebook developers site an error message keeps showing up saying
Site URL is not a valid URL.**
I' ve searched in google a lot but havent been able to solve the problem. They said write http:// before the link etc. but the problem is obviously not with that. On another site I've read it could be the fault of the server. If anyone knows a solution please reply.
Thanks in advance!!!