Lost Tiki database connection

Sorry but there seems to be a problem connecting to the system's database

This may only be a temporary problem, so please wait a while and click retry to try and go back to the home page

If it persists you should contact your system administrator

Fatal error: Uncaught Error: Call to a member function query() on null in /home/n169925/public_html/tiki/lib/core/TikiDb/Bridge.php:27 Stack trace: #0 /home/n169925/public_html/tiki/tiki-setup_base.php(91): TikiDb_Bridge->query('SHOW TABLES LIK...') #1 /home/n169925/public_html/tiki/tiki-setup.php(58): require_once('/home/n169925/p...') #2 /home/n169925/public_html/tiki/tiki-index.php(43): require_once('/home/n169925/p...') #3 {main} thrown in /home/n169925/public_html/tiki/lib/core/TikiDb/Bridge.php on line 27