Minecraft 1.12.2 Soul sand elevator does not work?

Ma
3

My Seelensand-Wasrer-elevator in 1.12.2 does not work.

how can i fix the problem?

Me

You can only build such an elevator on 1.13 or higher.

Sn

The Aquatic update and the mechanics you want to use are only available from 1.13

Mi

This is intended for the water mechanics added in 1.13.