[Prestashop 1.7.2.3] - Error 505 After installation

[Maximilian]

Hello everyone, 

 

I just installed prestashop on my server, everything went fine, and the installation was completed succesfully. But when I tried to visit my site for the first time or the admin panel, I get the Internal Error 500.

I debugged the problem and I got the following message:

 

EnvironmentIsBrokenException in Core.php line 110:Your system does not have a secure random number generator.

1. in Core.php line 110
2. at Core::secureRandom('32') in Key.php line 23
3. at Key::createNewRandomKey() in RuntimeTests.php line 85
4. at RuntimeTests::testEncryptDecrypt() in RuntimeTests.php line 60
5. at RuntimeTests::runtimeTest() in Crypto.php line 178
6. at Crypto::encryptInternal('checksum|1572323833', object(KeyOrPassword), false) in Crypto.php line 26
7. at Crypto::encrypt('checksum|1572323833', object(Key)) in PhpEncryptionEngine.php line 58
8. at PhpEncryptionEngineCore->encrypt('checksum|1572323833') in PhpEncryption.php line 59
9. at PhpEncryptionCore->encrypt('checksum|1572323833') in Cookie.php line 362
10. at CookieCore->encryptAndSetCookie('checksum|1572323833') in Cookie.php line 400
11. at CookieCore->write() in Employee.php line 497
12. at EmployeeCore->logout() in AdminController.php line 2798
13. at AdminControllerCore->init() in Controller.php line 186
14. at ControllerCore->run() in Dispatcher.php line 379
15. at DispatcherCore->dispatch() in index.php line 95

 

Any Idea how to fix this problem and make prestashop work?

 

Thanks in advance!

Edited October 21, 2017 by Maximilian (see edit history)

[Maximilian]

Okay, problem solved upgrading PHP from 5.5 to 7.1.