Recently having this issue also
Originally Posted by Maik268
I have a little problem with my One and the Play Store.
It has disappeared from the list of devices on the Play Store website.
There is only my old HTC Sensation, my HTC One is no longer there. A few days ago it was still in the list.
The data from the Play Store app I've already deleted.
What's the problem?
I am also having the same issue on my HTC One. This is a new problem that I've come across just today (23/08/13)
I had recently installed the MyGlass application to pair up my Glass, and everything has worked fine since then, however browsing the play store this morning has drawn my attention to the fact that my phone isn't visible on the devices list in the settings on play.google.com
I have tried deleting data from the Play Store as Maik had also done, but opening the play store again on my phone hasn't prompted me to add it to a device list as it usually does.
Upon further investigation I've found that my device isn't listed on the Android Device Manager, as it previously was yesterday.
Running on a HTC One on Android 4.2.2
Looking forward to seeing if anyone has this issue also so we can crunch through it together!
I have fixed my problem, though the fix may not be as helpful for you if you don't have multiple accounts on the same phone -
I have signed into Device Manager on a different account linked to my HTC One, and the phone was appearing and working fine [Was able to pull a location, call to the phone etc]
I signed back into my primary account, and the phone had appeared back on Android Device Manager, and going back to the Play Store device list brought the phone back into the list and I was able to install applications from the browser store.
Hope this helps you, good luck in your journey.