Does anyone know why the sky lobby was permanently closed down in the JP Morgan Chase Tower and the Wells Fargo Tower after 2015?

I used to visit the sky lobby of the JP Morgan Chase Tower when I was younger. It had some great views of downtown Houston.. but sometime after 2015, when I wanted to visit again, they said the sky lobby was permanently closed to visitors. Both the Chase and Wells Fargo Tower. I was really sad because that pretty much closed off all observatories in Houston.

San Antonio has the Tower of The Americas. Dallas has the Reunion Tower. Austin is about to have the Waterline Tower which will have an observation deck and restaurant. But Houston has none.. is there a reason for that?