yes lic is on the folder

pi@raspberrypi:/opt/VServer/licenses $ sudo ls
serials_190525 00105711.csv

the info look ok

The correct license file is named like:
license_lin_1234567890123456

Please add log entries about error - "unable to open database file".".

pi@raspberrypi:/opt/VServer/vlogs $ sudo tail -f vserver_20190702_145540.log
2019-07-02 16:12:34.276280 (TID 1767887664): (UID 19) SqliteStatement 'SELECT RowID AS RowID, "accnum", "nombre", "apellidos", "tel", "email", "locate" FROM "main" ORDER BY "RowID" ASC LIMIT 500 OFFSET 0' remoteID 1816411040 registered.
2019-07-02 16:12:34.282497 (TID 1767887664): (UID 19) SqliteCursor remoteID 1816320744 registered.
2019-07-02 16:12:34.289773 (TID 1742709552): (UID 19) ERROR 0x68500: Sqlite db "ipadcr.db": Error : "cannot commit - no transaction is active".
2019-07-02 16:12:34.293344 (TID 1767887664): (UID 19) SqliteStatement 'SELECT RowID AS RowID, "accnum", "nombre", "apellidos", "tel", "email", "locate" FROM "main" ORDER BY "RowID" ASC LIMIT 500 OFFSET 0' remoteID 1816411040 unregistered.
2019-07-02 16:12:34.293544 (TID 1767887664): (UID 19) SqliteCursor remoteID 1816320744 unregistered.
2019-07-02 16:12:48.999540 (TID 1742709552): (UID 19) Closing SqliteDatabase 'ipadcr.db': OK
2019-07-02 16:12:48.999775 (TID 1742709552): (UID 19) SqliteDatabase 'ipadcr.db' remoteID 1837193216 unregistered.
2019-07-02 16:12:49.029642 (TID 1742709552): (UID 19) Closing SqliteDatabase 'iPadProjects.db': OK
2019-07-02 16:12:49.029872 (TID 1742709552): (UID 19) SqliteDatabase 'iPadProjects.db' remoteID 1816185120 unregistered.
2019-07-02 16:12:49.029999 (TID 1742709552): (UID 19) Closing vSqlite-connection. ( vSqlite-connections count: '0'. Available: '1')

It is necessary to place the correct license file and restart the system.
Without the license, only one connection works and if you don't close it - the next connection attempt you get Error - "Service unavailable".

I add new lic and reboot but is no working

pi@raspberrypi:/opt/VServer/vlogs $ sudo tail -f vserver_20190703_103631.log
vServer is still working though (single connection allowed).
You need to get a FREE license with 5 Valentina DB, 10 SQLite, and 10 REST connections
OR purchase a license with more connections at Paradigma Store <http://www.valentina-db.com/en/store>;.
You will get your license file by email. Drop it into licenses folder and start server.

2019-07-03 10:45:41.699078 (TID 1865544496): (UID 20) REST connection 20892e654aac205efd602227a00bbcb1 established with '10.123.0.3:57636'. ( available: '0')
2019-07-03 10:45:42.586646 (TID 1847587632): Start parsing 'ipadcr.db' Access Control List (ACL).
2019-07-03 10:45:42.595994 (TID 1847587632): Finish parsing 'ipadcr.db' Access Control List (ACL).
2019-07-03 10:45:42.630810 (TID 1847587632): (UID 20) URI: "/rest/session_20892e654aac205efd602227a00bbcb1;/sql_fast". Error - "Sqlite db "/opt/VServer/databases_sqlite/ipadcr.db": Error : "unable to open database file".".
2019-07-03 10:45:47.465207 (TID 1857151792): (UID 20) Closing REST connection 20892e654aac205efd602227a00bbcb1. ( available: '1')

License is not recognized.
Is it a newly generated? Please send it to me to check (sergey_pashkov@valentina-db.com)

The license is working on my server:
user@user:/opt/VServer/vlogs$ sudo cat vserver_20190704_060811.log
2019-07-04 06:08:11.516330 (TID 140384127850688): Database engine inited
Licence license_lin_4440801612235611 is registered to Alexis Colon Lugo.
Valid until 9999-12-31. Subscription valid until 2020-07-02.

What do you have at the top of your log file?

pi@raspberrypi:/opt/VServer/vlogs $ sudo cat vserver_20190703_131159.log
2019-07-03 13:11:59.904041 (TID 1996426624): Database engine inited
2019-07-03 13:11:59.911300 (TID 1996426624): REST SSL port ignored - no rest SSL certificate.
2019-07-03 13:11:59.925997 (TID 1996426624): REST server started
ERROR: Licence serials_190702 00107980.csv is invalid.


/*************************************************************************************/
vServer name : vserver
vServer version : 9.1.2
vKernel version : 9.1.2
vServer arch : x32
vKernel type : internally-synched type (MT)
SQLite lib version : 3.26.0

HOSTINGMODE : false
ACCESSCONTROLLIST :
SINGLECONNECTIONPERLOGIN : false
LICENSECATALOG : licenses
SYSTEMCATALOG : databases
SYSTEMBACKUPCATALOG :
SYSTEMPROJECTCATALOG : projects
USEOLDPASSWORDS : false
FLUSHEACHDATACHANGES : false
PRIVILEGESENABLE : false
DISABLEDNS : true
BACKLOG : 20
THREADS : 5
MAXIDLECLIENTTIMEOUT : 20
MAXEXECUTIONCLIENTTIMEOUT : 0
MAXCONNECTIONTIMEOUT : 20
MAXTRANSFERTIMEOUT : 20
INITSLEEPTIME : 0
SLAVEMODE : false
EARLYOPENINGDATABASES : false
SQLITESYSTEMCATALOG : databases_sqlite
BONJOURENABLE : true
SCHEDULEENABLE : false
CACHESIZE : 10
MAILENABLE : false
LOGTOCONSOLE : true
LOGTOFILE : true
LOGTOSYSLOG : false
LOGFILESLOCATION : vlogs
LOGCONNECTIONTRAFFIC : false
VERBOSELEVEL : 2
CRASH_REPORTER_SEND : true
CRASH_REPORTER_OWNER_NAME : (null)
CRASH_REPORTER_OWNER_EMAIL : (null)
CRASH_REPORTER_LAST_CRASH : (null)

Maximum number of Valentina connections : 1
Maximum number of Sqlite connections : 1
Maximum number of REST connections : 1

Valentina Non-secure port : 15432
Valentina SSL port : 15434
Sqlite port : 15532
Sqlite SSL port : 15534
REST port : 1970
REST_SSL port : 1973
SNMP port : 15161
Notification port : 15436

WARNING: Owner name and email are missing in the INI file. It is highly recommended to fill this in to let the Valentina team contact you in case the server crashes.

Ok, please try to remove serials_190702 00107980.csv (leave only license_lin_4440801612235611 in the /opt/VServer/licenses) and restart the server.

Maybe you will start a new discussion for each separate issue?