Issue was caused by file in the framework folder of your child theme. It’s core file, don’t overwrite it in the child theme. If you need to change any function from that filter then copy that function only to your child theme and change it according to your needs. But don’t copy the whole file.
I renamed folder and footer works. So, follow the instructions I provided above.
One standard license is valid only for 1 project. Running multiple projects on a single license is a copyright violation.