解决办法，调整php.ini 的max_execution_time = 300值
I tried to install matomo (first time) and get after click "Next"-Button in welcome screen for step 2 (system check) this error:
Matomo encoutered an error: Maximum execution time of 30 seconds exceeded (which lead to: SQLSTATE[3D000]: Invalid catalog name: 1046 No database selected)
What is here to do? Set a higher execution time lead only to this
Fatal error: Maximum execution time of 90 seconds exceeded in \matomo-3.5.1\core\FileIntegrity.php on line 324
https://github.com/matomo-org/matomo/blob/3.x-dev/core/FileIntegrity.php#L324
At all I read many times take a look in config.ini, but this file not exists in root or config-folder.
System Windows 10.
Solution: Make maximum execution time of 120 or more.