After install it show a Blank site

[rlpmax]

After a reinstall(Ubuntu18.04) it doesnt show the frontend.
And i find this Error in the debug log:
[2021-02-22 22:18:57] front end error (IP) [2021-02-22 22:18:57] CMemCache requires PHP memcache extension to be loaded.

[MrCamby]

Same problem here

[2021-02-23 13:13:31] front end error 10.0.20.10
[2021-02-23 13:13:31] CMemCache requires PHP memcache extension to be loaded.

Ubuntu 18.04.5 LTS fresh installed

[MrCamby]

@rlpmax you need to install
php7.3-memcache
php7.3-memcached

[afiniel]

sudo apt-get install -y php7.3-memcache

[catcoin-project]

You might have to compile memcache from source. Sometimes especially now packages are missing in PHP archives.

Run phpize in the top of the memcache source directory, then configure and make. You will want to add it to the available modules for PHP and enable in the modules for php-fpm.