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If you use an already existing virtual host, please add at least the following both settingssetting:
SetEnv APPLICATION_ENV application php_value include_path .:/var/www/translate5/library/zend/:/usr/share/php5:/usr/share/php
On other systems, this may be different, for example on Debian 10 Buster it should be:
PHP include path in the php.ini
Check that the PHP include path contains at least "." and the PHP system paths. So should be something like:
php_value include_path .:/var/www/translate5/library/zend/:/usr/share/php5:/usr/share/php:/usr/share/php7.3-common
Since translate5 needs no change here, just use the system default in doubt.
Please be aware, that you have to check your webserver and this apache configuration regarding security, if you oppose your translate5 instance to the internet. Your security is your responsibility and can not be covered by this manual.
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