Keep in mind that this only happens in the final render 'cause if I click the render preview, the throne appears with its normal texture (black with glowy red)
Here’s the link to the .blend file so you can see the thing better.
For those having the same issue here’s what I did that fixed the problem: go to External Data and click the checkbox that says Automatically Pack Into .blend and then save the file, that’s 'cause I was using the google colab server to render my project, not my own laptop