This is caused because Artica did not correctly clean the log partition ( This is fixed in 2.x versions)
If you want to use the 1.9x, use this way to clean your log partition:
Use the terminal or any SSH connection:
wget https://articatech.net/download/remove-artica-logs.sh
chmod 0755 remove-artica-logs.sh
./remove-artica-logs.sh