In 2016, Blizzard Entertainment released patch 1.14d. This update focused on system compatibility for modern operating systems like Windows 7, 8, and 10. It also introduced a upgraded installer and improved cheat detection. The Evolution of No-CD Cracks

Specific Changes & Improvements. Implemented Blizzard Error and System Survey to better troubleshoot crashes and assertions. Diablo Wiki Contributors to Diablo Wiki Diablo II - PCGamingWiki PCGW

If your game is on an older version and you need to reach 1.14d:

For single-player enthusiasts, PlugY provides an infinite stash and enables ladder-only runewords, which significantly increases the "quality" of the gameplay loop.