Fatal error in latest update of plugin

Hi,

I just updated to V1.3..4 and my site got a fatal error – error details below.
Luckily WP recovery mode let me sort it out and deactivate the plugin and then site working again fine.
Can you please take a look:

`Error notification

For site
https://tourismsuccess.com
? Error Level:
E_ERROR
? Message:
Uncaught Error: Class “WP_CLI” not found in /home/iu1gpez/public_html/wp-content/plugins/cache-warmer/src/class-extend-wp-cli.php:21
Stack trace:
#0 /home/iu1gpez/public_html/wp-content/plugins/cache-warmer/cache-warmer.php(170): Cache_Warmer\Extend_WP_CLI->__construct()
#1 /home/iu1gpez/public_html/wp-includes/class-wp-hook.php(324): Cache_Warmer\Cache_Warmer->Cache_Warmer\{closure}()
#2 /home/iu1gpez/public_html/wp-includes/class-wp-hook.php(348): WP_Hook->apply_filters()
#3 /home/iu1gpez/public_html/wp-includes/plugin.php(517): WP_Hook->do_action()
#4 /home/iu1gpez/public_html/wp-settings.php(700): do_action()
#5 /home/iu1gpez/public_html/wp-config.php(108): require_once(‘/home/iu1gpez/p…’)
#6 /home/iu1gpez/public_html/wp-load.php(50): require_once(‘/home/iu1gpez/p…’)
#7 /home/iu1gpez/public_html/wp-blog-header.php(13): require_once(‘/home/iu1gpez/p…’)
#8 /home/iu1gpez/public_html/index.php(17): require(‘/home/iu1gpez/p…’)
#9 {main}
thrown
? File:
/wp-content/plugins/cache-warmer/src/class-extend-wp-cli.php
? Line:
21
? Request:
/favicon.ico

Thanks.
Dale.