[SOLVED] Error while creating new Organization

Hello to everyone.
I'm new of projeqtor, which I have installed last week (version 7.0.1) and updated this morning (7.0.2).
When I configure the program for the first time I have all the parameters green, in the first setup, and it seems to work.
I'm starting with the configuration of the company, by adding (as admin user) resources and users, but when I try to create Organizations (by clicking on the add button in the "Organization" section) I obtain the error showed in the picture.
This happened in 7.0.1, and the same happens with 7.0.2.

What I'm doing wrong?
I also attach the Log file.

So your suggestion is to open the mysql command line client and delete all the schemes?
And then to create a new one?
(I'm not used to work with all these programs, so I just know the commands

create database newdatabasename
use newdatabasename)

So,
-I installed phpmyadmin
-I created a new empty database (I have not deleted the existing ones)
-I deleted parametersLocation.php to configure from scratch Porjeqtor
-I configured Projeqtor to use the new database
-I obtained the access page in which I must insert admin-admin credentials
-I obtained the "database update completed to version v7.0.2" message, green
-I entered in Projeqtor and immediatelly tried to create an organization (before any other user or resource), but again I get an error.
I attach the new log file, hoping it helps.

Just a note: I see that the character codification of the database is latinl_swedish_ci (Don't ask why: but for my understanding this is very strange)... can this matter? what is the correct codification?