Hello,
sorry the instructions weren't complete. I just tested the following command lines:
rm /tmp/playbook*
rm -rf /tmp/tmpplaybook*
rm /etc/cron.d/ansible*
slapos node stop slapproxy
rm /opt/slapos/slapproxy.db
rm -rf /opt/slapgrid
rm -rf /srv/slapgrid
rm -rf /etc/opt
slapos configure local
slapos node supervisorctl reread
slapos node start slapproxy
# then start the installation again
wget https://deploy.erp5.net/erp5-standalone
bash erp5-standalone
root@erp:~# bash erp5-standalone
...
gzip: stdin: unexpected end of file
tar: Child returned status 1
tar: Error is not recoverable: exiting now
Sorry for this error, we had a problem on one of our server yesterday preventing the installer to run correctly.