So somehow the Minecraft suddenly started working. I don't know how but it just did so i guess problem solved. Thank you very very much for your help anyway. You took a great care of me❤️
Hehe, make some copies of all mods and config files used in your modpack. This includes mod .jar files and all configuration files.
Then go to Modrinth and create a new project. Upload all the mod .jar files you want to include in your modpack, as well as any additional files or resources.
Let me know later if it worked