thanks for your suggests.
The configuration of Atom is as expected from the various stages of the installation.
I tried to change the settings in the PHP configuration files but without success.
The cause could be the size of the archive...
I also have another problem.
On the authority records page, on the left side, there are not all the relationships.
I have tried this sequence of operations:
1. php symfony cc
2. Restarting PHP-FPM
3. php symfony propel:build-nested-set
4. php symfony search:populate
but unfortunately it didn't work , this is the most important problem to be solved for me