Hi Joslinlee, I'm having the same issue with 2 of our business pages. Did you manage to resolve your problem? I'd love to know how, if you have?
For the last couple days I've not been able to access my Facebook business page on desktop. I've tried with multiple browsers, deleted cookies and third party add ons, rebooted my computer a couple times... Still can't get it to load.
I can access the admin side on my phone, but when I try to get to the page on desktop, I get an error message: "Facebook is unable to handle this request". If I type in the URL, it'll take me to the front end of my page, but as soon as I log in I get the error message. Haven't found any helpful forums as of yet. Getting desperate.