CRITICAL_ERROR:
Line 144 /home/hosting/powertunning/class2.php

Error reported as: [1]: Unable to read core settings from database - Core settings exist but cannot be unserialized. Attempting to restore core backup ...
CRITICAL_ERROR:
Line 151 /home/hosting/powertunning/class2.php

Error reported as: [4]: No core backup found. Please run the Reset_Core utility to rebuild your core settings.
After rebuilding your core please save a backup from the admin/sql screen.