Site stops working after updated latest version

The beta version _2.8.5_beta works better. (But it does appear in WordPress as a “lower” version, so WordPress will want to “update” it to 2.8.4)

Beta Releases — https://github.com/aramk/crayon-syntax-highlighter
If you use GIT, you can do:
[~/www/wp-content/plugins]# git clone https://github.com/aramk/crayon-syntax-highlighter.git

Beta version 2.8.5_beta is working on WordPress v5.2 :
https://website-tech.glerner.com/2016-troubleshooting-php-wordpress-delays/