Facebook comments module in opencart gives "url is unreachable" error

Facebook comments module in opencart gives "url is unreachable" error

I've installed Facebook comments module for opencart, and it was working
properly till I activated SEO URL for opencart and it gives warning: URL
is unreachable, and here is what I get on Facebook Debugger:
https://developers.facebook.com/tools/debug/og/object?q=http%3A%2F%2Fsimiaservice.com%2Fgift%2F˜ی˜-äÓ˜ÇÝå-Èی-Èی-ÇÑÓÇá-åÏیå-Èå-ÇیÑÇä
Would you please advise me what is the problem and how I can fix it?