composer odmítá cokoliv nainstalovat

Zdravím mám problém,
před nedávném mi composer fungoval i v phpstormu tak i na serveru (rpi)
ale začal dělat problémy
a to takové, že nejde nainstalovat nic..
na rpi mi to vyhazuje tento error (na konci příspěvku)
Bohužel nevím jak to opravit, předtím jsem na pc měl verzi php 5.6 a teď mám 7.0 může tohle být problém proč to nejde?..
děkuji za odpověď

Your requirements could not be resolved to an installable set of packages.

  Problem 1
    - nette/nette v2.3.9 requires latte/latte 2.3.10 -> satisfiable by latte/latte[v2.3.10] but these conflict with your requirements or minimum-stability.
    - nette/nette v2.3.8 requires latte/latte 2.3.8 -> satisfiable by latte/latte[v2.3.8] but these conflict with your requirements or minimum-stability.
    - nette/nette v2.3.7 requires latte/latte 2.3.6 -> satisfiable by latte/latte[v2.3.6] but these conflict with your requirements or minimum-stability.
    - nette/nette v2.3.6 requires latte/latte 2.3.6 -> satisfiable by latte/latte[v2.3.6] but these conflict with your requirements or minimum-stability.
    - nette/nette v2.3.5 requires latte/latte 2.3.4 -> satisfiable by latte/latte[v2.3.4] but these conflict with your requirements or minimum-stability.
    - nette/nette v2.3.4 requires latte/latte 2.3.3 -> satisfiable by latte/latte[v2.3.3] but these conflict with your requirements or minimum-stability.
    - nette/nette v2.3.3 requires latte/latte 2.3.2 -> satisfiable by latte/latte[v2.3.2] but these conflict with your requirements or minimum-stability.
    - nette/nette v2.3.2 requires latte/latte 2.3.2 -> satisfiable by latte/latte[v2.3.2] but these conflict with your requirements or minimum-stability.
    - nette/nette v2.3.10 requires latte/latte ~2.3.11 -> satisfiable by latte/latte[v2.3.11, v2.3.12, v2.3.13, v2.3.x-dev] but these conflict with your requirements or minimum-stability.
    - nette/nette v2.3.1 requires latte/latte 2.3.1 -> satisfiable by latte/latte[v2.3.1] but these conflict with your requirements or minimum-stability.
    - nette/nette v2.3.0 requires latte/latte 2.3.0 -> satisfiable by latte/latte[v2.3.0] but these conflict with your requirements or minimum-stability.
    - nette/nette v2.2.9 requires latte/latte 2.2.5 -> satisfiable by latte/latte[v2.2.5] but these conflict with your requirements or minimum-stability.
    - nette/nette v2.2.8 requires latte/latte 2.2.5 -> satisfiable by latte/latte[v2.2.5] but these conflict with your requirements or minimum-stability.
    - nette/nette v2.2.7 requires latte/latte 2.2.4 -> satisfiable by latte/latte[v2.2.4] but these conflict with your requirements or minimum-stability.
    - nette/nette v2.2.6 requires latte/latte 2.2.4 -> satisfiable by latte/latte[v2.2.4] but these conflict with your requirements or minimum-stability.
    - nette/nette v2.2.5 requires latte/latte 2.2.4 -> satisfiable by latte/latte[v2.2.4] but these conflict with your requirements or minimum-stability.
    - nette/nette v2.2.4 requires latte/latte 2.2.4 -> satisfiable by latte/latte[v2.2.4] but these conflict with your requirements or minimum-stability.
    - nette/nette v2.2.3 requires latte/latte 2.2.3 -> satisfiable by latte/latte[v2.2.3] but these conflict with your requirements or minimum-stability.
    - nette/nette v2.2.2 requires latte/latte 2.2.2 -> satisfiable by latte/latte[v2.2.2] but these conflict with your requirements or minimum-stability.
    - nette/nette v2.2.13 requires latte/latte ~2.2.9 -> satisfiable by latte/latte[v2.2.9, v2.2.x-dev] but these conflict with your requirements or minimum-stability.
    - nette/nette v2.2.12 requires latte/latte 2.2.9 -> satisfiable by latte/latte[v2.2.9] but these conflict with your requirements or minimum-stability.
    - nette/nette v2.2.11 requires latte/latte 2.2.7 -> satisfiable by latte/latte[v2.2.7] but these conflict with your requirements or minimum-stability.
    - nette/nette v2.2.10 requires latte/latte 2.2.6 -> satisfiable by latte/latte[v2.2.6] but these conflict with your requirements or minimum-stability.
    - nette/nette v2.2.1 requires latte/latte 2.2.1 -> satisfiable by latte/latte[v2.2.1] but these conflict with your requirements or minimum-stability.
    - nette/nette v2.2.0 requires latte/latte 2.2.0 -> satisfiable by latte/latte[v2.2.0] but these conflict with your requirements or minimum-stability.
    - Conclusion: don't install nette/nette v2.4.0
    - Installation request for kdyby/wkhtmltopdf ^0.1.0 -> satisfiable by kdyby/wkhtmltopdf[v0.1].
    - Conclusion: remove nette/application v2.4.12
    - Installation request for nette/robot-loader (locked at v3.0.4, required as ^2.4 || ^3.0) -> satisfiable by nette/robot-loader[v3.0.4].
    - Conclusion: don't install nette/application v2.4.12
    - kdyby/wkhtmltopdf v0.1 requires nette/nette * -> satisfiable by nette/nette[v2.1.10, v2.1.11, v2.1.12, v2.1.9, v2.0.10, v2.0.11, v2.0.12, v2.0.13, v2.0.14, v2.0.15, v2.0.16, v2.0.17, v2.0.18, v2.0.2, v2.0.3, v2.0.4, v2.0.5, v2.0.6, v2.0.7, v2.0.8, v2.0.9, v2.1.0, v2.1.1, v2.1.2, v2.1.3, v2.1.4, v2.1.5, v2.1.6, v2.1.7, v2.1.8, v2.2.0, v2.2.1, v2.2.10, v2.2.11, v2.2.12, v2.2.13, v2.2.2, v2.2.3, v2.2.4, v2.2.5, v2.2.6, v2.2.7, v2.2.8, v2.2.9, v2.3.0, v2.3.1, v2.3.10, v2.3.2, v2.3.3, v2.3.4, v2.3.5, v2.3.6, v2.3.7, v2.3.8, v2.3.9, v2.4.0].
    - nette/nette v2.0.10 conflicts with nette/application[v2.4.12].
    - nette/nette v2.0.11 conflicts with nette/application[v2.4.12].
    - nette/nette v2.0.12 conflicts with nette/application[v2.4.12].
    - nette/nette v2.0.13 conflicts with nette/application[v2.4.12].
    - nette/nette v2.0.14 conflicts with nette/application[v2.4.12].
    - nette/nette v2.0.15 conflicts with nette/application[v2.4.12].
    - nette/nette v2.0.16 conflicts with nette/application[v2.4.12].
    - nette/nette v2.0.17 conflicts with nette/application[v2.4.12].
    - nette/nette v2.0.18 conflicts with nette/application[v2.4.12].
    - nette/nette v2.0.2 conflicts with nette/application[v2.4.12].
    - nette/nette v2.0.3 conflicts with nette/application[v2.4.12].
    - nette/nette v2.0.4 conflicts with nette/application[v2.4.12].
    - nette/nette v2.0.5 conflicts with nette/application[v2.4.12].
    - nette/nette v2.0.6 conflicts with nette/application[v2.4.12].
    - nette/nette v2.0.7 conflicts with nette/application[v2.4.12].
    - nette/nette v2.0.8 conflicts with nette/application[v2.4.12].
    - nette/nette v2.0.9 conflicts with nette/application[v2.4.12].
    - nette/nette v2.1.0 conflicts with nette/application[v2.4.12].
    - nette/nette v2.1.1 conflicts with nette/application[v2.4.12].
    - nette/nette v2.1.10 conflicts with nette/application[v2.4.12].
    - nette/nette v2.1.11 conflicts with nette/application[v2.4.12].
    - nette/nette v2.1.12 conflicts with nette/application[v2.4.12].
    - nette/nette v2.1.2 conflicts with nette/application[v2.4.12].
    - nette/nette v2.1.3 conflicts with nette/application[v2.4.12].
    - nette/nette v2.1.4 conflicts with nette/application[v2.4.12].
    - nette/nette v2.1.5 conflicts with nette/application[v2.4.12].
    - nette/nette v2.1.6 conflicts with nette/application[v2.4.12].
    - nette/nette v2.1.7 conflicts with nette/application[v2.4.12].
    - nette/nette v2.1.8 conflicts with nette/application[v2.4.12].
    - nette/nette v2.1.9 conflicts with nette/application[v2.4.12].
    - Installation request for nette/application (locked at v2.4.12, required as ^2.4.4) -> satisfiable by nette/application[v2.4.12].


Installation failed, reverting ./composer.json to its original content.