I am watching a program on acorn through xfinity. I keep getting play back era 1001.What is this

Hello user_9srmo6, thanks for taking the time to reach out on our Forums regarding the playback error you're receiving. We appreciate you being a customer with us, and it's important that the programs you enjoy watching are working properly. I am sorry to hear that you ran into this error. 

To better support you with this, did this occur while watching Live TV or a recorded program? Has it occurred more than once or is this the first time? Also, are you watching through an Xfinity cable box, through the Xfinity Stream app on a mobile device, or through 3rd party equipment (Roku, Smart TV)? 

We look forward to assisting you!