What does the error code c101b000 represent?

it's 2017 and I just had this error code!!!!!!!!!!

hard reset, soft reset doesn't work at all

pleaseeee need help to solve this problem

Got this problem on one Nokia Lumia 640 with Windows 8 on a other Nokia Lumia 640 with Windows 10 its working and i can download every app i want.

The error code and the solution is the same, regardless of the year.

As already posted just two messages above yours, this is a problem with the store on Microsoft's side which reoccurs every few weeks. Unfortunately there is absolutely nothing anyone can do except wait for it to be fixed by MS. There is no point in performing any resets or, God forbid, a complete firmware reinstall. This is not an issue with any device, it's on the store servers.

I was getting this error code as I was attempting to install an application from the Marketplace. The application will download perfectly, but when it tries to install the application, it would continuously give me this same error code. This occurred on multiple application installation attempts, so I know it is not a problem with one specific application that I am attempting to install. I am completely lost on what in the world this might be. I need help here.

I've tried all these so far and even went on to WiFi to download and still receive the message. Ugh.  Mine is a Windows Lumina

Same problem plz tell me how to fix