[nateprewitt (maintainer)]: Boto3 1.33.0 and up needs awscrt 0.19.17 or newer for its S3 CRT paths. If you see import or S3 errors right after upgrading boto3, upgrade awscrt (pip install -U awscrt) or disable the CRT with the BOTO_DISABLE_CRT environment variable. Boto3 1.33.3 also shipped to smooth the transition; if you then see cannot import S3ResponseError from awscrt.s3, upgrade s3transfer to 0.8.2.

_Source: gh:boto/boto3#3951 (AWS S3)_