[Site Builder] Problems appear before the start of the installation

[alcobra]

vBulletin 5.6.2 Install System
(Please be patient as some parts may take some time)


Startup Warnings
It is advisable to resolve the following issues prior to continuing with the install. To check that the issues have been resolved, hit "refresh". To continue without resolving the issues, hit "confirm":

• Checksum file md5_sums_vbulletin.php is currently writable. Please ensure that this file is not writable by the webserver.
• Following is a list of files that are either missing or contain unexpected contents. The most likely cause is that all of the files from this release have not been properly uploaded. You should resolve this error before continuing.
  /core/error_log - File not recognized as part of vBulletin
  /core/clientscript/index.html - File not found
  /core/clientscript/sitemap/index.html - File not found
  /fonts/index.html - File not found
  /fonts/alice/index.html - File not found
  /fonts/arvo/index.html - File not found
  /fonts/capriola/index.html - File not found
  /fonts/dosis/index.html - File not found
  /fonts/hind/index.html - File not found
  /fonts/lato/index.html - File not found
  /fonts/nunito/index.html - File not found
  /fonts/oswald/index.html - File not found
  /fonts/playfairdisplay/index.html - File not found
  /fonts/raleway/index.html - File not found
  /fonts/robotocondensed/index.html - File not found
  /fonts/robotoslab/index.html - File not found
  /fonts/stintultraexpanded/index.html - File not found
  /fonts/ubuntu/index.html - File not found
  /images/themes/index.html - File not found
  /images/themes/blackred/index.html - File not found
  /images/themes/blueyellow/index.html - File not found
  /images/themes/dark/index.html - File not found
  /images/themes/denim/index.html - File not found
  /images/themes/gradient/index.html - File not found
  /images/themes/greystripes/index.html - File not found
  /images/themes/grunge/index.html - File not found
  /images/themes/oldschool/index.html - File not found
  /images/themes/stripes/index.html - File not found
  /images/themes/wood/index.html - File not found
  /js/ckeditor/images/index.html - File not found
  /js/ckeditor/images/dark/index.html - File not found
  /js/ckeditor/images/dark/vbulletin/index.html - File not found
  /js/ckeditor/images/default/vbulletin/index.html - File not found

Do you ignore all these warnings and complete the installation?

[Wayne Luke]

On a properly configured and secure server, the missing index.html files won't cause a problem one way or another. Every single one of them is a 0 byte empty file that shows a blank screen should anyone enter those directories with their browser. We only include them to prevent someone from browsing your directories and learning about the files within them when the user is on an improperly configured server. In a perfect world, they wouldn't be there to begin with.

The error_log file means that something in your vBulletin directory is causing PHP Errors. Again, in a perfect world this file would never exist and vBulletin would hum along nicely on your server. Unfortunately, you're not so lucky. However, its mere existence doesn't mean something is really wrong. It would have to be reviewed to determine what the problem is.

[alcobra]

Now I understand that Thank you