Spectra version 2.19.4 Update Issue

Hello,

my current website is using Spectra version 2.15.1 installed, and i notice there is
Spectra – WordPress Gutenberg Blocks <= 2.19.0 – Authenticated (Contributor ) Stored Cross-Site Scripting vulnerabilities ,so i try update to latest 2.19.4 after that the site is down and not accessable, i try this in my dev server not production .. if you can help us to fix issue and update to latest version.