error in one forum

[avillanueva]

My forum is working well but in one of them when I try to publish something as Administrator, appear this message: "Invalid Page URL. If this is an error and the page should exist, please contact the system administrator and tell them how you got this message."
In module of recent Post appear the topic with its link but when I try to go there, appear the same message.
Please any help about this issue

[BirdOPrey5]

Does this forum have any special or non-English characters in the title? Can you give us a link to it?