Doesn't work on my iPhone X

Plugged into both a computer and a wall outlet. Both times it started charging and showed a green light. Shortly after, it began flashing blue and stopped charging. I tried it with an OtterBox and without an OtterBox. Tried repositioning it, tried changing the cord it came with, and tried a different outlet. Same result each time. Really bummed about this because it looked nice on my desk at work.

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