Memcached not working [Ubuntu 20.04, PHP 7.2, latest bazukachan build]

[semliki]

Fatal error: Uncaught Error: Class 'Memcached' not found in /home/[redacted]/inc/cache.php:16 Stack trace: #0 /home/[redacted]/inc/cache.php(41): Cache::init() #1 /home/[redacted]/inc/functions.php(876): Cache::get('all_boards') #2 /home/[redacted]/inc/mod/pages.php(79): listBoards() #3 /home/[redacted]/mod.php(223): mod_dashboard() #4 {main} thrown in /home/[redacted]/inc/cache.php on line 16 Fatal error: Uncaught Error: Class 'Memcached' not found in /home/[redacted]/inc/cache.php:16 Stack trace: #0 /home/[redacted]/inc/cache.php(41): Cache::init() #1 /home/[redacted]/inc/mod/auth.php(160): Cache::get('pm_unread_1') #2 /home/[redacted]/inc/template.php(41): create_pm_header() #3 /home/[redacted]/display.php(128): Element('error.html', Array) #4 /home/[redacted]/inc/functions.php(393): error('Caught fatal er...', 3) #5 [internal function]: fatal_error_handler() #6 {main} thrown in /home/[redacted]/inc/cache.php on line 16

I'm getting this error. Using php7.2, respective version of memcached and php module for it, have the server running. It's just tinyboard that's causing an issue. Not sure what it is.