The state file that is being called by state.apply is defined in the Aria Automation UI file system and does not exist on the local file system of the salt-master where the fileroots directory is defined.
Salt - all supported versions
Aria Automation Config - all supported versions
This issue can happen if the /etc/salt/master or a conf file in /etc/salt/master.d does not have the fileserver_backend section defiled and it does not have the sseapi file backend defined somewhere in the list.
Add sseapi to the /etc/salt/master file in the fileserver_backend section
fileserver_backend:
...
- sseapi
...