PHP ERROR

Hi!

Running the update I'm getting this error:
PHP Fatal error: Uncaught Error: Call to undefined function mysqli_connect() in /tmp/update_stable.sh.SqErbhuff5/ispconfig3_install/install/update.php:234

Stack trace:

#0 {main}

thrown in /tmp/update_stable.sh.SqErbhuff5/ispconfig3_install/install/update.php on line 234

and with:

/usr/local/ispconfig/server/server.sh

31.12.2017-14:15 - WARNING - There is already a lockfile set, but no process running with this pid (16570). Continuing.

PHP Fatal error: Uncaught Error: Call to undefined function mysqli_connect() in /usr/local/ispconfig/server/lib/classes/db_mysql.inc.php:79

Stack trace:

#0 /usr/local/ispconfig/server/lib/app.inc.php(46): db->__construct()

#1 /usr/local/ispconfig/server/lib/app.inc.php(208): app->__construct()

#2 /usr/local/ispconfig/server/server.php(51): require('/usr/local/ispc...')

#3 {main}

thrown in /usr/local/ispconfig/server/lib/classes/db_mysql.inc.php on line 79

PHP Fatal error: Uncaught Error: Call to undefined function mysqli_connect() in /usr/local/ispconfig/server/lib/classes/db_mysql.inc.php:79

Stack trace:

#0 /usr/local/ispconfig/server/lib/app.inc.php(46): db->__construct()

#1 /usr/local/ispconfig/server/lib/app.inc.php(208): app->__construct()

#2 /usr/local/ispconfig/security/check.php(32): require('/usr/local/ispc...')

#3 {main}

thrown in /usr/local/ispconfig/server/lib/classes/db_mysql.inc.php on line 79

Any idea how to fix that issue?

Many thanks.

 

Is this ISPConfig update with ispconfig_update.sh ?
What is the operating system, version and what is PHP version? Have You modified PHP installation or settings?

 

Yes with ispconfig_update.sh
Debian 9, PHP 7.0. I was using PHP 5.6 previously.