TypeError: metaclass conflict: the metaclass of a derived class must be a (non-strict) subclass of the metaclasses of all its bases

[ngvananh2508]

Describe the bug

In GSEA chapter, when I import scanpy 1.9.1 (the package that you deploy in the recommended environment), it emits the error above. This can be gotten around with lowering the version of matplotlib (<3.7). I hope you can change the version of matplotlib in the requirement to avoid this incompatibility.

Thank you