Hello I am having this error message
in my web site in Aruba

Fatal error call to a member function close () on a non-object in web/htdocs/www. /home/plugin/mobile/terafurfl/DatabaseConnectors/TeraWurflDatabase_MySQL5.php on line 108

if I switch to my sql4 I get this error message Fatal error call to a member function close () on a non-object in web/htdocs/www. /home/plugin/mobile/terafurfl/DatabaseConnectors/TeraWurflDatabase_MySQL4.php on line 93

Can you help me please?
I had problem with the new Joomla Mobile version, so it's better not to update it
Thanks

Most likely your server has some issues with mysqli library, or doesn't allow to open several connections to mysql at once.

Until you found reason for the issue, you can disable Mobile-Scientia plugin and use Mobile-AMDD instead.