问题
I tried to enable Facebook Insights for my web. I added my page's APP_ID to fb:admins to enable every admin of my page to access Insights when logged into Facebook as Page. But when I try to save the dialog message appears:
The app ID "123,123,123,123,123" specified within the "fb:app_id" meta tag was invalid.
I double checked my app ID and it's correct.
回答1:
To link Domain Insights to an app rather than a user, you need to use the fb:app_id tag:
<meta property="fb:app_id" content="your_app_id" />
Source: https://developers.facebook.com/docs/insights/
回答2:
Only personal IDs are allowed in the fb:admins meta tag. Application IDs won't work, even though they are actually valid (in contrary to what the error message says).
Optionally, it may also work with page_id:
<meta property="fb:page_id" content="395450240451647" />
The suggested app_iddidn't work at all :(
回答3:
You have to make public you app to start works.
回答4:
error invalid fb:app_id is sometimes misleading. The account you are using to test this needs to be added into test users list of facebook app. Or try to test using the admin account.
回答5:
Sometime your facebook information already crawl by facebook and it will be cache
You need to clear there cache to test again
You can access this link : https://developers.facebook.com/tools/debug/
paste your clink you want to test
Click Crawl again
来源：https://stackoverflow.com/questions/13347937/the-app-id-specified-within-the-fbapp-id-meta-tag-was-invalid