The value of the Hubble parameter determined locally from the Type Ia supernovae is found to be greater than that determined from the Cosmic Microwave Background (CMB) radiation. This is known as the 'Hubble Tension' or even 'Crisis in Cosmology'.
Why is this a problem?
If we assume that the Universe is accelerating, the higher value of the Hubble parameter locally can simply be explained as a result of that acceleration.
Indeed, the higher near-value of the Hubble parameter compared to its farther-value was the sole basis for the proposal of Dark Energy and Accelerating Universe.
What am I missing?