Bitcoin Core version 0.15.0.1 is not available for security reasons:

https://bitcoin.org/bin/bitcoin-core-0.15.0.1/

and

https://bitcoincore.org/bin/bitcoin-core-0.15.0.1/

This is a new major version release, including new features, various bugfixes and performance improvements, as well as updated translations.

Please report bugs using the issue tracker at GitHub:

https://github.com/bitcoin/bitcoin/issues

To receive security and update notifications, please subscribe to:

https://bitcoincore.org/en/list/announcements/join/