passlib 1.7.4 (unmaintained since 2020) is incompatible with bcrypt>=4.0: - bcrypt 4.x removed bcrypt.__about__ (passlib version probe fails) - bcrypt 4.x enforces 72-byte password limit strictly, crashing passlib's detect_wrap_bug() compatibility test during context init Pinning bcrypt<4.0.0 is the standard workaround until passlib is replaced. Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>