Complex sentence: Problems arose because of the quality of 90.192.220.247's contribution, which failed to provide a reference, and the consequence of not doing so was that this new, prominent material was destined to be noticed and taken down.
Split into simpler sentences: Problems arose because of the quality of 90.192.220.247's contribution which didn't provide any reference whatsoever. The consequence of not doing so was that the material was destined to be noticed and taken down.