The installation of TeamViewer on the RPi was successful (I ran teamviewer passwd and teamviewer setup) and I can see the machine on "My Computers" on Window's TeamViewer. However, when I try to connect I get the WaitForConnectFailed error message.
I noticed my framebuffer was 16bits and changed it to 32bits, still the same error.
Tried connecting my computer to another network (my phone's 4G), since others said it could be a router issue, same error.
I changed my /boot/config.txt and it's currently like this: