Got invalid signature while running examples/schnorr.c

[Shinku1014]

I am learning how schnorr works, but after I compiled the project and I run schnorr in examples, It just occured like
Is the signature valid? false Secret Key: 0x83a63bcc897b7234104a0e496c06f8c967561ad1d1c1476eb2f1122c2baaead2 Public Key: 0x43cb4a2aefa443117cd19e3c30758f15303f0d60696325ab759748d584857cad Signature: 0x38ca6a2dcd6610b28e88149ec909f26b42a0d479a58511929bac84a2143926d9dc95866e2502d5781d45f7a21a3b54d228d12365f1acbbf0bdeca9a8dbab3a32
I've even written a loop for 100,000 times, and still haven't seen a single valid signature.
What should I do to get a valid signature?
MacOS 14.5, Apple clang version 12.0.5
I apologize for asking a stupid question, if more information is needed I will provide it as soon as possible, and I apologize for taking up your time!