Yes, P.Rick's answer is right. In my case, I just can not install the right version with any changes on LINUX UBUNTU 20.04 with Nvidia RTX 4090, and the cuda version is 11.3. Conda has some bugs and pip can not solve the installation problem either. In my case, I just install the version on https://pytorch-geometric.com/whl/torch-1.11.0%2Bcu113.html to solve the problem. I believe there are some problems with pip's dependency. Because in my case, the default package is 0.6.18. However, in the link above, only 0.6.15 is presented. And in my case, the problem is perfectly solved with 0.6.15.