Short summary: the study partly conflicts other results, and the mass loss seen in that study may be more due to the limitations of their measurement technique (radar altimetry) versus other techniques (gravity).
There's more at the link referenced above. (See also: https://www.washingtonpost.com/news/energy-environment/wp/20...)
Claimer: while not involved in ice mass quantification, I talk regularly with people who do it full time, publish regularly, are leads on space instruments to measure it, etc.
And, like other commenters nearby, I want to caution you on your approach to "skepticism" and "keeping an open mind".
You seem to be selecting one press release from the hundreds released every year, and using its partial conflict with other information to call the whole hypothesis (significant ice melting caused by global warming) into question. That's not a valid mode of inquiry - especially when you don't have the training and time to keep up with current work.
It's like walking into an IC fab and asking why they are not using EUV lithography (it was in this article in Wired!) when you didn't even take a semiconductor physics class in college.
The right place to start, if you really want to get informed, is the IPCC AR5 report (https://www.ipcc.ch/report/ar5/). Reading press releases only makes sense if you can put it into context.