It seems that didn´t match the PHP version of Apache with the PHP in command line. have updated the PHP version of the Apache web server, from 7.2 to 7.4:
To enable php7.4: a2enmod php7.4
To disable php7.2: a2dismod php7.2
Restart apache.
Now this is my configuration in Apache:
| Configuration File (php.ini) Path | /etc/php/7.4/apache2 |
|---|---|
| Loaded Configuration File | /etc/php/7.4/apache2/php.ini |
| Scan this dir for additional .ini files | /etc/php/7.4/apache2/conf.d |
I could see now the ownCloud installation page, instead of the blank page I got before when I had PHP errors.