PHP fatal error

[kooby]

I have been running a site (still on 6.4.4 - php7.2) for a number of years without problems until suddenly the site has crashed, shows 500 error and the error log shows the following:

[16-Mar-2023 22:57:24 UTC] PHP Fatal error:  Uncaught Error: Class 'memcached' not found in /home/xxxxx/public_html/store/classes/cache/memcached.class.php:38
Stack trace:
#0 /home/xxxxx/public_html/store/classes/cache/memcached.class.php(66): Cache->__construct()
#1 /home/xxxxx/public_html/store/controllers/controller.index.inc.php(20): Cache::getInstance()
#2 /home/xxxxx/public_html/store/index.php(20): include('/home/xxxxx/...')
#3 {main}
  thrown in /home/xxxxx/public_html/store/classes/cache/memcached.class.php on line 38

I can't get in admin so am stumped.

Is there any way of recovering the site or is it a complete re-install?

 

[kooby]

Partly solved. Checked the includes/global.inc.php and changed the cache from 'memcached' to 'file' and  it loads ok.

Don't know why memcached doesn't work though!!