Blank Page!

Hi, i installed the plugin and working fine, facebook accept my articles and was all good but at sometime (don’t know how) i can’t access the plugin settings page. i get a blank page and i have no idea how to fix it. i have uninstalled the plugin and installed it again but nothing happened. Also i have read some other topics here, try some things but can’t solve the problem. I am not a programer and i don’t know how to fix it. Is there any solution? or i cant use facebook instant articles? What i have to do?