drupal 9 support?

[nandt]

hello , can i use this template with drupal 9 ? i have tried to install that with composer and i have the following error :

Problem 1

• Conclusion: don't install openeuropa/oe_theme 2.14.0
• Conclusion: remove twig/twig v2.14.3
• Installation request for openeuropa/oe_theme ^2.14 -> satisfiable by openeuropa/oe_theme[2.14.0, 2.x-dev].
• Conclusion: don't install twig/twig v2.14.3
• openeuropa/oe_theme 2.x-dev requires openeuropa/ecl-twig-loader ~2.0 -> satisfiable by openeuropa/ecl-twig-loader[2.0.0, 2.1.0, 2.x-dev].
• openeuropa/ecl-twig-loader 2.0.0 requires twig/twig ^1.34 -> satisfiable by twig/twig[1.x-dev, v1.34.0, v1.34.1, v1.34.2, v1.34.3, v1.34.4, v1.35.0, v1.35.1, v1.35.2, v1.35.3, v1.35.4, v1.36.0, v1.37.0, v1.37.1, v1.38.0, v1.38.1, v1.38.2, v1.38.3, v1.38.4, v1.39.0, v1.39.1, v1.40.0, v1.40.1, v1.41.0, v1.42.0, v1.42.1, v1.42.2, v1.42.3, v1.42.4, v1.42.5, v1.43.0, v1.43.1, v1.44.0, v1.44.1, v1.44.2].
• openeuropa/ecl-twig-loader 2.1.0 requires twig/twig ^1.34 -> satisfiable by twig/twig[1.x-dev, v1.34.0, v1.34.1, v1.34.2, v1.34.3, v1.34.4, v1.35.0, v1.35.1, v1.35.2, v1.35.3, v1.35.4, v1.36.0, v1.37.0, v1.37.1, v1.38.0, v1.38.1, v1.38.2, v1.38.3, v1.38.4, v1.39.0, v1.39.1, v1.40.0, v1.40.1, v1.41.0, v1.42.0, v1.42.1, v1.42.2, v1.42.3, v1.42.4, v1.42.5, v1.43.0, v1.43.1, v1.44.0, v1.44.1, v1.44.2].
• openeuropa/ecl-twig-loader 2.x-dev requires twig/twig ^1.34 -> satisfiable by twig/twig[1.x-dev, v1.34.0, v1.34.1, v1.34.2, v1.34.3, v1.34.4, v1.35.0, v1.35.1, v1.35.2, v1.35.3, v1.35.4, v1.36.0, v1.37.0, v1.37.1, v1.38.0, v1.38.1, v1.38.2, v1.38.3, v1.38.4, v1.39.0, v1.39.1, v1.40.0, v1.40.1, v1.41.0, v1.42.0, v1.42.1, v1.42.2, v1.42.3, v1.42.4, v1.42.5, v1.43.0, v1.43.1, v1.44.0, v1.44.1, v1.44.2].
• Can only install one of: twig/twig[1.x-dev, v2.14.3].
• Can only install one of: twig/twig[v1.41.0, v2.14.3].

[Galexy5]

I think the theme only works with drupal 8