php - TYPO3 10.4.12 installation blocked on second step

Question

After Enviroment Overview (No Problems) i cannot continue with the installation.
It's blocked at 2/5 40%.

When I press "No Problems detected, continue with installation" these errors are displayed in the console:

GET htttp://serverip/typo3/install.php?install[action]=checkDatabaseConnect net::ERR_ABORTED 500


AjaxRequest.js?bust=b0198a052e375a7df3e7d6dfe2fd1ed07efd1ed7:13

Uncaught (in promise) s.AjaxResponse {response: Response} 

install.php:1

• apache2 mods checked
• php.ini max_input_vars=1500 and so on (as described in System Req), changed
• no .htaccess in root of server
• no .htaccess at /var/www/domain.com/
• .htaccess in /var/www/domain.com/public generated by TYPO3

This action looks not quite finished: [action]=checkDatabaseConnect

System:

• Debian 9 (stretch)
• Apache/2.4.25
• MySQL 8.0
• PHP 7.4

question from:https://stackoverflow.com/questions/65881009/typo3-10-4-12-installation-blocked-on-second-step

Answer 1

After checking the Logs

CRITICAL ERROR mysql_init() undefined

apt-get install php7.4-mysql

on other php Version just changing the 7.4 might do it