hello, the simplest and safest solution is to use a live with solus os, and within the live of solus os look for the sbin folder
Already inside it look for the init file, copy it and in the file manager look for the partition of your solus os, not the live one, look for the one you have installed on your pc (hard disk), already inside the root partition of your solus looks for the sbin folder and pastes the file you copied into it, if it doesn't let you paste it, open the terminal and execute sudo nautilus and enter your password, now paste it according to the above.
Step 2: now go back to the root folder of your live solus os and enter the usr folder in which inside you will notice a folder called lib which you have to copy everything and move it to the usr folder located in the root folder of your pc where your solus os (hard disk) is installed, if it asks you to overwrite accept everything.
Everything would be repaired, just restart your system.
Note: this error occurs because during the installation or configuration of a program the init of the system is changed or the lib folder of usr is deleted, with this it is solved, if you want I will create an explanatory video for you though it's just that.
