Hi Altrea and Nobbie,
Thank you very much for your help
@Altrea
I´m attaching you the error.log from Apache and php_error_log (they are from today, same error)
Error.log
[Wed Nov 25 08:23:56.038107 2015] [ssl:warn] [pid 535] AH01906: www.example.com:443:0 server certificate is a CA certificate (BasicConstraints: CA == TRUE !?)
[Wed Nov 25 08:23:56.061909 2015] [ssl:warn] [pid 535] AH01909: www.example.com:443:0 server certificate does NOT include an ID which matches the server name
[Wed Nov 25 08:23:56.062941 2015] [suexec:notice] [pid 535] AH01232: suEXEC mechanism enabled (wrapper: /Applications/XAMPP/xamppfiles/bin/suexec)
[Wed Nov 25 08:23:57.002213 2015] [ssl:warn] [pid 536] AH01906: www.example.com:443:0 server certificate is a CA certificate (BasicConstraints: CA == TRUE !?)
[Wed Nov 25 08:23:57.002359 2015] [ssl:warn] [pid 536] AH01909: www.example.com:443:0 server certificate does NOT include an ID which matches the server name
[Wed Nov 25 08:23:57.002681 2015] [lbmethod_heartbeat:notice] [pid 536] AH02282: No slotmem from mod_heartmonitor
[Wed Nov 25 08:23:57.002721 2015] [auth_digest:notice] [pid 536] AH01757: generating secret for digest authentication ...
[Wed Nov 25 08:23:57.290780 2015] [mpm_prefork:notice] [pid 536] AH00163: Apache/2.4.17 (Unix) OpenSSL/1.0.1p PHP/5.6.14 mod_perl/2.0.8-dev Perl/v5.16.3 configured -- resuming normal operations
[Wed Nov 25 08:23:57.290841 2015] [core:notice] [pid 536] AH00094: Command line: '/Applications/XAMPP/xamppfiles/bin/httpd -E /Applications/XAMPP/xamppfiles/logs/error_log -D SSL -D PHP'
[Wed Nov 25 08:25:39.817413 2015] [mpm_prefork:notice] [pid 536] AH00169: caught SIGTERM, shutting down
[Wed Nov 25 14:59:34.092408 2015] [ssl:warn] [pid 918] AH01906: www.example.com:443:0 server certificate is a CA certificate (BasicConstraints: CA == TRUE !?)
[Wed Nov 25 14:59:34.097288 2015] [ssl:warn] [pid 918] AH01909: www.example.com:443:0 server certificate does NOT include an ID which matches the server name
[Wed Nov 25 14:59:34.098734 2015] [suexec:notice] [pid 918] AH01232: suEXEC mechanism enabled (wrapper: /Applications/XAMPP/xamppfiles/bin/suexec)
[Wed Nov 25 14:59:35.002280 2015] [ssl:warn] [pid 919] AH01906: www.example.com:443:0 server certificate is a CA certificate (BasicConstraints: CA == TRUE !?)
[Wed Nov 25 14:59:35.002432 2015] [ssl:warn] [pid 919] AH01909: www.example.com:443:0 server certificate does NOT include an ID which matches the server name
[Wed Nov 25 14:59:35.002764 2015] [lbmethod_heartbeat:notice] [pid 919] AH02282: No slotmem from mod_heartmonitor
[Wed Nov 25 14:59:35.002804 2015] [auth_digest:notice] [pid 919] AH01757: generating secret for digest authentication ...
[Wed Nov 25 14:59:35.354587 2015] [mpm_prefork:notice] [pid 919] AH00163: Apache/2.4.17 (Unix) OpenSSL/1.0.1p PHP/5.6.14 mod_perl/2.0.8-dev Perl/v5.16.3 configured -- resuming normal operations
[Wed Nov 25 14:59:35.354671 2015] [core:notice] [pid 919] AH00094: Command line: '/Applications/XAMPP/xamppfiles/bin/httpd -E /Applications/XAMPP/xamppfiles/logs/error_log -D SSL -D PHP'
[Wed Nov 25 15:02:37.065700 2015] [mpm_prefork:notice] [pid 919] AH00169: caught SIGTERM, shutting down
Php_error_log
[25-Nov-2015 08:24:28 Europe/Berlin] PHP Fatal error: Class 'Tools' not found in /Applications/XAMPP/xamppfiles/htdocs/prestashop/classes/PrestaShopAutoload.php on line 168
[25-Nov-2015 08:24:34 Europe/Berlin] PHP Fatal error: Class 'Tools' not found in /Applications/XAMPP/xamppfiles/htdocs/prestashop/classes/PrestaShopAutoload.php on line 168
[25-Nov-2015 15:02:26 Europe/Berlin] PHP Fatal error: Class 'Tools' not found in /Applications/XAMPP/xamppfiles/htdocs/prestashop/classes/PrestaShopAutoload.php on line 168
@Nobbie
Maybe I´m wrong but htdocs is in both sides: xampp>htdocs and xampp/xamppfiles/htdos. I have recorded a video to check if the problem is here. Take a look but Prestashop folders is in both sides
https://www.youtube.com/watch?v=4piCf15ZssY
Hope you could help
Thanks a lot