[Tiki-users] Installer: "session_start(): Session cannot be started..."

Hi

I'm installing Tiki on a new system. In tiki-install.php, I get a lot of
derprecation warnings and then the following two messages and the page "TIKI
INSTALLER SECURITY PRECAUTION":

Warning: session_set_cookie_params(): Session cookie parameters cannot be
changed after headers have already been sent in /srv/www/htdocs/tiki/tiki-
install.php on line 67

Warning: session_start(): Session cannot be started after headers have
already been sent in /srv/www/htdocs/tiki/tiki-install.php on line 69

I have to enter the database credentials and get to the "Welcome" page. When
I click on "Continue", I'm back at the "TIKI INSTALLER SECURITY PRECAUTION".
It's a loop.

This looks like a cookie problem. What's up? Could it be on the Apache side?

I'm installing from a pre-existing database. When starting again from
scratch, a few steps in the installer are completed but then I'm back at the
security caution page again.

I've tried it with both Brave and Firefox.

tiki-check.php runs fine.

Cheers,
Volker