Keine Installation möglich

I don't know which Creative Suite product you're trying to install or which operating system you have.  But Creative Suite is very old, obsolete software that's no longer supported.

CS1, CS2, CS3 and CS4 activation servers are dead & gone. Even if you find an old installer, it's impossible to activate the software.

CS5 and CS6 are on life support. But they can still be activated providing you have the following:
1. your original media (disks or downloads) you received at purchase and a way to read them,
2. a legitimate serial number for that version, language and platform (Win/Mac) and if it was an upgrade, a qualifying serial number from an older product,
3. an older operating system that can support legacy 32-bit apps.

NOTE 1 : Creative Suite installers won't work on macOS Sierra, High Sierra or Mojave without terminal workarounds. See the help article below.
https://helpx.adobe.com/creative-cloud/kb/install-creative-suite-mac-os-sierra.html

NOTE 2: Legacy Creative Suite will never run on Catalina, Big Sur, Monterey, Ventura... Nor will it be tested on Win 11. Only the latest Creative Cloud products are compatible with newer systems.

===============
MODERN CODE EDITORS:
-- Adobe Dreamweaver CC - https://www.adobe.com/products/dreamweaver.html
-- Codespaces (free, browser-based) - https://github.com/features/codespaces
-- Nova (Mac only, formerly called Coda) - https://nova.app/
-- Pinegrow - https://pinegrow.com/
-- Sublime Text - http://www.sublimetext.com/
-- Visual Studio Code (free) - https://code.visualstudio.com/
-- Wappler ~ Visual Web App Builder - https://wappler.io/

Hope that helps.

What version are you trying to install? What error are you getting when you try to install?