XF 2.2 Posting URLs fails on v2.2.13

[larossmann]

If I try to post boards.rossmanngroup.com , I can

If I try to post a post with www.boards.rossmanngroup.com or https://boards.rossmanngroup.com , it fails with this odd error.

 

[James]

That board is running with debug mode enabled which isn't recommended.

Your posts will still happen it's just a php notice intended for developers.

Advise the site owner to disable debug mode.