Are we in a Dark Age right now?
These days, for some reason, some certain groups of people are trying to rename the Dark Ages and whitewash them, but I think it's pretty clear that there was a lot more learning and recording of knowledge after the Enlightenment than before.
Failure to transmit the culture's foundations to the next generation? Given the contempt for "dead white European males", arguably we're in a dark age by this standard.
Loss of technical progress (and even technical regress)? No.
Few records or little information about that age available to future ages? No. Even if you worry about loss of digital information, our garbage dumps contain insane amounts of printed matter, most of it buried quickly enough and deep enough that it's in anaerobic storage. There will be plenty for future societies to read about our current age.