No Analytics data appearing
Since a few days ago GA does not show any data ("0" on Real Time, on customer acquisition, adwords). We have not made any changes what so ever, and Google says tracking is implemented correctly, it just seems to have stopped working all of a sudden.
Also, we have just started a facebook campaign that in facebook ads manager is showing a tremendous amounts of clicks to our website, but not a single one is registered under medium/source, or as a referral or anything else in GA.
Re: No Analytics data appearing
If GA is configured properly on the page and within the admin sections of your Account, Property and Views you should be seeing data. Can you post your URL so one of us can check common deployment issues. I know you said no changes were made but unless you are the only person with access to your websites code it might have been affected by anothers actions.