There can be a few reasons for this
1 - You have been banned or blocked from our page either recently or in the past. You can create a ticket with our help desk to investigate this. Not all blocks are removed just because someone asks to be unblocked. It will depend on the reason for the block
2 - Facebook sometimes has issues and pages do not resolved. Wait a few hours and try again.
3 - Low Data - if you do not have strong enough Cellular or WiFi data connection, Facebook sometimes loads slow and will not show a page.