Clipit: Redirecting the terminal output to clipit is not working

Hello,

I want to pipe the output of a command to clipit in order to have it in my history and paste it wherever I need but it doesn't work. From the clipit's man page:

CLI EXAMPLES
    Put text in the clipboard
       echo "copied to clipboard" | clipit
       clipit "copied to clipboard"

    Put text in the clipboard and print the clipboard contents
        echo "copied to clipboard" | clipit -c

However, I've tried several ways to achieve that but it doesn't seem to work. So far I've tried:

• echo "Hello!" | clipit
• echo "Hello!" | clipit -c # it succesfully outputs "Hello!" though
• clipit "Hello!"
• clipit > echo "Hello!"

All of the above commands result in my clipboard being somehow empty. If I hit CTRL+V in any text field, or CTRL+SHIFT+V in my terminal, it pastes nothing.
It doesn't work if I right click on a text field either because the "Paste" option in the menu is greyed out as if my clipboard is empty, as stated earlier.
If I manually select any text though, both in a text field and in my terminal, it'll work as normal.

I installed Clipit from the Arch User Repository through this package.

How can I solve this? Hope I'm not doing anything wrong.

System info:

__OS:__ Arch Linux x86_64
__Host:__ HP Pavilion 15 Notebook PC 0881100000305E00000620100
__Kernel:__ 4.14.12-1-ARCH
__WM: i3__
__Theme:__ Vimix-Dark-Ruby [GTK2/3]
__Icons:__ Papirus-Dark [GTK2/3]
__Terminal:__ tilix
__CPU:__ AMD A6-5200 APU (4) @ 2.00GHz
__GPU:__ AMD Radeon HD 8670M