Installation problem

[provitek]

Please help :)

kickstart-9770.tar.gz
PHP 7.1.29
XAMPP
Microsoft Windows [Version 10.0.17134.765]

c:\xampp\htdocs\ks>composer install
Class DrupalProject\composer\S
criptHandler is not autoloadable, can not call pre
-update-cmd script
Loading composer repositories with package information
Updating dependencies (including require-dev)
Your requirements could not be resolved to an installable set of packages.

Problem 1
- Conclusion: don't install drupal/core 8.7.1
- Installation request for acquia/lightning 3.1.3 -> satisfiable by acquia/lightning[3.1.3].
- Conclusion: don't install drupal/core 8.7.0
- Can only install one of: drupal/core[8.6.0, 8.5.x-dev].
- Can only install one of: drupal/core[8.6.0-alpha1, 8.5.x-dev].
- Can only install one of: drupal/core[8.6.0-beta1, 8.5.x-dev].
- Can only install one of: drupal/core[8.6.0-beta2, 8.5.x-dev].
- Can only install one of: drupal/core[8.6.0-rc1, 8.5.x-dev].
- Can only install one of: drupal/core[8.6.1, 8.5.x-dev].
- Can only install one of: drupal/core[8.6.10, 8.5.x-dev].
- Can only install one of: drupal/core[8.6.11, 8.5.x-dev].
- Can only install one of: drupal/core[8.6.12, 8.5.x-dev].
- Can only install one of: drupal/core[8.6.13, 8.5.x-dev].
- Can only install one of: drupal/core[8.6.14, 8.5.x-dev].
- Can only install one of: drupal/core[8.6.15, 8.5.x-dev].
- Can only install one of: drupal/core[8.6.16, 8.5.x-dev].
- Can only install one of: drupal/core[8.6.2, 8.5.x-dev].
- Can only install one of: drupal/core[8.6.3, 8.5.x-dev].
- Can only install one of: drupal/core[8.6.4, 8.5.x-dev].
- Can only install one of: drupal/core[8.6.5, 8.5.x-dev].
- Can only install one of: drupal/core[8.6.6, 8.5.x-dev].
- Can only install one of: drupal/core[8.6.7, 8.5.x-dev].
- Can only install one of: drupal/core[8.6.8, 8.5.x-dev].
- Can only install one of: drupal/core[8.6.9, 8.5.x-dev].
- Can only install one of: drupal/core[8.6.x-dev, 8.5.x-dev].
- Can only install one of: drupal/core[8.7.0-alpha1, 8.5.x-dev].
- Can only install one of: drupal/core[8.7.0-alpha2, 8.5.x-dev].
- Can only install one of: drupal/core[8.7.0-beta1, 8.5.x-dev].
- Can only install one of: drupal/core[8.7.0-beta2, 8.5.x-dev].
- Can only install one of: drupal/core[8.7.0-rc1, 8.5.x-dev].
- Can only install one of: drupal/core[8.7.x-dev, 8.5.x-dev].
- Can only install one of: drupal/core[8.8.x-dev, 8.5.x-dev].
- Conclusion: install drupal/core 8.5.x-dev
- Installation request for drupal/core ^8.6.0 -> satisfiable by drupal/core[8.6.0, 8.6.0-alpha1, 8.6.0-beta1, 8.6.0-beta2, 8
.6.0-rc1, 8.6.1, 8.6.10, 8.6.11, 8.6.12, 8.6.13, 8.6.14, 8.6.15, 8.6.16, 8.6.2, 8.6.3, 8.6.4, 8.6.5, 8.6.6, 8.6.7, 8.6.8, 8.6.9,
8.6.x-dev, 8.7.0, 8.7.0-alpha1, 8.7.0-alpha2, 8.7.0-beta1, 8.7.0-beta2, 8.7.0-rc1, 8.7.1, 8.7.x-dev, 8.8.x-dev].

c:\xampp\htdocs\ks>
kickstart-9770.tar.gz