Facebook Page Stopped Appearing in Facebook Ads Manager

I was running an ad for the past days and it suddenly stopped, when I tried to duplicate the ad, the facebook page and Instagram page associated with this Ads Manager were no longer showing for some reason.

I verified this ads manager almost a mont a go when it was disabled and I received an email saying that this was a mistake. The ads manager was working perfectly until yesterday, and there is no email or notification that explains the reason behind it.

I account is mine and I have full admin control.

I need a Facebook Expert that is familiar with this kind of errors to find a solution the soonest possible to resume my ads.