I manage a comapny's facebook fanpage (with a lot of posts and comments). To collect posts and comments from my company fanpage, I created an app and an extended page access token and did data collection successfully. After about an hour through data collection, I got an error and the process was halted. I suspect I might have used a temporary page access token, instead of the extended page access token, for the data collection.
Next day, I deleted the old app and created a new app to get "user access token" with manage_page permission and "page access token". However, a new user access token/page access token is never issued again. I clicked on the submitt button, but no access token is generated anymore. Any suggestions?