Stats class causing PHP fatal error

I was running some commands with WP-CLI and started receiving the following error on the command line: PHP Fatal error: Uncaught Error: Class 'SeriouslySimpleStats\Classes\Stats' not found in /home/nick/witness.show/releases/8/web/app/plugins/seriously-simple-stats/seriously-simple-stats.php:48

This error does not occur when I disable Seriously Simple Stats, but I’m not sure how to correct it. I’ve put the full error and stack traces below.

Just a note on my setup, it’s a Bedrock WordPress installation running a Sage theme and deployed using Deployer.

Any help or ideas would be appreciated, thanks!

PHP Fatal error:  Uncaught Error: Class 'SeriouslySimpleStats\Classes\Stats' not found in /home/nick/witness.show/releases/8/web/app/plugins/seriously-simple-stats/seriously-simple-stats.php:48
Stack trace:
#0 /home/nick/witness.show/releases/8/web/app/plugins/seriously-simple-stats/seriously-simple-stats.php(53): SSP_Stats()
#1 /home/nick/witness.show/releases/8/web/wp/wp-settings.php(362): include_once('/home/nick/witn...')
#2 phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Runner.php(1188): require('/home/nick/witn...')
#3 phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Runner.php(1111): WP_CLI\Runner->load_wordpress()
#4 phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Bootstrap/LaunchRunner.php(23): WP_CLI\Runner->start()
#5 phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/bootstrap.php(74): WP_CLI\Bootstrap\LaunchRunner->process(Object(WP_CLI\Bootstrap\BootstrapState))
#6 phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/wp-cli.php(23): WP_CLI\bootstrap()
#7 phar:///usr/local/bin/wp/php/boot-ph in /home/nick/witness.show/releases/8/web/app/plugins/seriously-simple-stats/seriously-simple-stats.php on line 48
Fatal error: Uncaught Error: Class 'SeriouslySimpleStats\Classes\Stats' not found in /home/nick/witness.show/releases/8/web/app/plugins/seriously-simple-stats/seriously-simple-stats.php:48
Stack trace:
#0 /home/nick/witness.show/releases/8/web/app/plugins/seriously-simple-stats/seriously-simple-stats.php(53): SSP_Stats()
#1 /home/nick/witness.show/releases/8/web/wp/wp-settings.php(362): include_once('/home/nick/witn...')
#2 phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Runner.php(1188): require('/home/nick/witn...')
#3 phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Runner.php(1111): WP_CLI\Runner->load_wordpress()
#4 phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/WP_CLI/Bootstrap/LaunchRunner.php(23): WP_CLI\Runner->start()
#5 phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/bootstrap.php(74): WP_CLI\Bootstrap\LaunchRunner->process(Object(WP_CLI\Bootstrap\BootstrapState))
#6 phar:///usr/local/bin/wp/vendor/wp-cli/wp-cli/php/wp-cli.php(23): WP_CLI\bootstrap()
#7 phar:///usr/local/bin/wp/php/boot-ph in /home/nick/witness.show/releases/8/web/app/plugins/seriously-simple-stats/seriously-simple-stats.php on line 48