error on httpd resolved.
After running firstboot script, I get:

The password for mysql and cyrus admin were successfully changed!
Applying MySQL script /var/spool/elastix-mysqldbscripts/01-asteriskcdrdb.sql ...
Applying MySQL script /var/spool/elastix-mysqldbscripts/01-freepbx.sql ...
Applying MySQL script /var/spool/elastix-mysqldbscripts/02-asteriskuser-password.sql ...
No Elastix CallCenter database found.
No A2Billing database found.
No VTigerCRM database found.
Updating FreePBX database password: mysql... files... updated
Updating FreePBX admin password: mysql... files... updated
Updating FreePBX ARI password: mysql... files... updated
Updating Flash Operator Panel password: mysql... files... updated
Updating Asterisk Manager Interface password: mysql... files... updated
Updating Elastix admin password: sqlite... FATAL: unable to update Elastix admin password: SQLSTATE[HY000]: General error: 1 no such table: acl_user

@scottalanmiller After restarting several times, I finally made a snapshot on digital ocean just after downloading the ISO. It feels like I have saved my game just before a big boss.

Got this installed except for the same error I see here (http://mangolassi.it/topic/6319/elastix-4-install-errors-with-sqlite-unable-to-update-admin-password/6) Any resolution to this?

The database asterisk is there with a table called "ampusers" where it looks like passwords are stored in a field called "password_sha1".

I had no luck with UPDATE (ing) that table and setting password_sha1=SHA1("newpassword") WHERE user="admin"

Feels so close.

@scottalanmiller tried removing this section, but then no password is set for the admin account. I seem installed, but cannot log in. . Am trying on digitalocean as well with centOS 7.

Also, the line "systemctl enable httpd.server" produces file not found error.

@rialejo @scottalanmiller
I tried restarting the service httpd, no luck. I think http server is working because it serves the login page no problem. The troublesome error happens when the first_boot script tries to set the Elastix admin password where there is an sql_lite command that produces error acl_users table not found.

I tried login: admin, password: palosanto to no avail. Going to try doing a fresh start with the httpd service line corrected, and will advise.

@rialejo I have the same result from rpm -qa | grep httpd

any luck @rialejo ?
I may try 3.5 instead of 4...

I almost immediately begin experiencing errors such as:
"Error de conexion a la base de datos - Array ( [0] => HY000 [1] => 8 [2] => attempt to write a readonly database )"

and it is does not seem possible to install addons such as "Call Center" ... Addons menu has error "Query Error SELECT * FROM action_tmp"

When installing "Call Center": The column 'has_account' does not exist and could not be created

The backend does look very nice though.

Success!
Has anyone had any luck installing any addons?

Thanks @scottalanmiller -- So the basic practice is to install via cd locally, and then replace the missing files?

I read somewhere that rpm support for elastix 4 is beginning at the end of the month, so maybe we'll have full proper rpm support by monday?

@rialejo @scottalanmiller -- Anyone know if the call center module will be compatible with the new version? Maybe this is too hopeful...

Installed Elastix 4 via VM-Player. Can confirm that installation of Call Centre add-on is smooth until the progress bar finishes, then it is not installed, and produces an error when trying to restart the installation. Can successfully create and register extensions in the virtual machine.

Copied the contents of /var/www/db from this install to a fresh, rpm-based install on remote server.
Can login, and create extensions, but cannot register them. Also unable to install call centre add-on.

I'm trying on DIgital Ocean - maybe I'll give virtualbox a try tonight

So in order to get Elastix 4 running, all I need is a copy of Elastix 4 that is running. Gotcha.

I almost immediately begin experiencing errors such as:
"Error de conexion a la base de datos - Array ( [0] => HY000 [1] => 8 [2] => attempt to write a readonly database )"

and it is does not seem possible to install addons such as "Call Center" ... Addons menu has error "Query Error SELECT * FROM action_tmp"

When installing "Call Center": The column 'has_account' does not exist and could not be created

The backend does look very nice though.

I can confirm that replacing all of these files with their equivalent versions from a working version of Elastix 2.5 does indeed allow me to log in, and I can (for the first time) see Elastix 4.

Not overly comfortable with this as a "solution" but thanks for sharing

@rialejo I've seen this fix --- it looks promising, but in my asterisk database, I don't have a table called acl_users. ..getting close.

any luck @rialejo ?
I may try 3.5 instead of 4...