Install cachefilesd by entering the following commands in the terminal:
sudo apt update sudo apt install cachefilesd
support fscache on already mounted filesystem
FSCache is a generic caching manager in the Linux kernel which can be used by network and other filesystems to cache data locally. . CacheFiles is an FSCache backend that's meant to use as a cache a directory on an already mounted filesystem of a local type (such as Ext3). This package installs the userspace support required by the cachefiles backend.