Why did SAARC fail the hope for regional cooperation?

In November 2014, the 18th South Asian Association for Regional Cooperation (SAARC) summit adopted a 36-point Kathmandu Declaration, entitled Deeper Integration for Peace and Prosperity , promising necessary cooperation and collaboration among the member states.

As per the announcement, Pakistan was scheduled to host the 19th SAARC summit in November 2016. However, in September 2016, after a terrorist attack on the Indian Army brigade headquarters near the town of Uri, Baramulla, Kashmir, which was allegedly conducted by the Jaish-e-Mohammed insurgents, the Indian side decided to boycott the summit. Soon after, Bangladesh, Afghanistan, Sri Lanka, and Bhutan followed suit and also denied attending the summit.