Cannot install on Debain 10

Hello -

I really wanted this software to work, but after hours of getting it to install I am giving up. The installation instructions are missing too many steps...

I am at the configuration screen and I cannot get the software to accept my changes. Its stuck at :

impossible to write \'../tool/parametersLocation.php\' file, cannot write to such a file : check access rights

Not matter what directory I put in, even /tmp won't work.

Here are my install instructions:

apt install apache2
apt install mariadb-server
run mysql_secure_installation ( no root password)
apt install php libapache2-mod-php php-gd php-mysql

Install PHP modules (if missing):

php-gd
php-imap
php-mbstring
php-mysql
php-xml
php-zip

edit php.ini ==> max_input_vars = 4000

log into MYSQL:

mysql -u root -p
Grant privileges. To a new user execute:

CREATE USER 'projeqtor'@'localhost' IDENTIFIED BY 'password';
GRANT ALL PRIVILEGES ON *.* TO 'projeqtor'@'localhost';
FLUSH PRIVILEGES;

bind to all addresses:
The easiest way is to comment out the line in your /etc/mysql/mariadb.conf.d/50-server.cnf

#bind-address = 127.0.0.1

reboot

connect to : http://localhost/projeqtor