---
title: "Facebook: and canvas page POSTing"
description: I came across this issue today where I was getting an error when trying to add the to a canvas page of a page-only app. The app was installed on a Facebook Page of which I was an admin.
---
[Fresh Thoughts Blog](https://blog.thoughtlabs.com/blog)
# [Facebook: and canvas page POSTing](https://blog.thoughtlabs.com/blog/facebook-and-canvas-page-posting)
Written by [Cappy Popp](https://blog.thoughtlabs.com/blog/author/cappy-popp) | Feb 21, 2008
I came across this issue today where I was getting an error when trying to add the to a canvas page of a page-only app.
The app was installed on a Facebook Page of which I was an admin.
Basically I had the following situation:
\[0\] canvas page that had rendered correctly at top when the canvas page was first hit
\[1\] canvas page had a simple non-Ajax form that submitted back to itself via POST
\[2\] POST url just contained URL of page
When I submitted the form, I kept getting the following error:
---------------------
**Errors while loading page from application
Runtime errors:**
fb:page-admin-edit-header can only display on a fbpage application.
There are still a few kinks Facebook and the makers of Accountability Journal-cp are trying to iron out. We appreciate your patience as we try to fix these issues. Your problem has been logged - if it persists, please come back in a few days. Thanks!
---------------------
I verified that the app was indeed a 'page-only' app, and that I had admin rights to the Facebook Page on which it was installed.
It seemed to me that this app was working perfectly until today, though I may be wrong about that...
It turns out that you **MUST** add the 'fb\_page\_id=\[pageID\]' URL param to the POST URL. Even though all of the FB variables were present in the original POST (fb\_sig\_page\_id, fb\_sig\_is\_admin=1, etc.) it appears that you must still provide the URL param in order for the FBML processing to insert the correctly.
[View full post](https://blog.thoughtlabs.com/blog/facebook-and-canvas-page-posting)
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