Columns not working

I have a page here:

https://platinumrockstars.com/bands/bostyx-all-the-hits-of-boston-styx/

That uses the columns shortcode. The plug-in is active (otherwise I wouldn’t have been able to easily insert the shortcode in the WP editor.

Here’s the code on the page:

[columns]
[column width=”one-half”]
BOSTYX? features the hits and vibe of two American pop music icons BOSTON and STYX all in one high-energy show that is sure to please classic rock ‘n roll fans of all ages. BOSTYX features DAVID VICTOR, who was featured as a guitarist/vocalist on BOSTON’s summer 2012 and 2014 tours of North America and in 2013 at the sold-out Boston Strong Benefit with Aerosmith at the Boston Garden in front of an audience of nearly 20,000. David Victor’s vocals and guitar playing make this tribute to the amazing music of BOSTON and STYX as real as it can get!
[/column]
[column width=”one-half”]
And when it comes to the challenging vocal stylings of STYX and Dennis De Young, no one other than the original artists have ever sung it better than drummer/vocalist Glenn Jost of BOSTYX as you’ll see in the LIVE video below, shot for AXS TV at the Whiskey A Go-Go in Hollywood, CA.
[/column]
[/columns]

https://www.ads-software.com/plugins/easy-responsive-shortcodes/