Thread:Project:Support desk/Upgrading to 1.19.7 question/reply (5)

If - as you write - you have PHP 5.2.5, then this error normally should not happen. Maybe you have PHP installed without the hash extension? You can check that in the output of phpinfo. If hash is available, then there should be some hits in that page, e.g. a section on available hash functions. If it is not, activate the hash extension in php.ini.