I made Facebook Login button for a site, on localhost it works but on DO VPS it doesn’t. I am thinking that requests from VPS -> Facebook are changed, goes through another machine before reaching Facebook. Here are all details https://github.com/facebook/facebook-php-sdk-v4/issues/476
I don’t know what to do and what/how to debug this problem.
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Hi @arteniioleg
On Monday-Tuesday I will move everything from DO to other server, and will see if it helps.
The support guy said that there is nothing in between my VPS and Facebook.
Then I have no idea what to do next.