This is a Unity bug produced when you assign a null target render texture.
It is easy to fix:
It is easy to fix:
*- go to: ProjectSettings -> Water2D
![](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/14071844970/original/bWhMo04vPNVmMOJOzatI0oL_FiHxcSkhbQ.png?1600985922)
*- Press Flip Patch button, let it work and when is finish, press rebuild of any spawner
*- This is the Rebuild button.
![](https://s3.amazonaws.com/cdn.freshdesk.com/data/helpdesk/attachments/production/14071845052/original/mZi1xS-UQOLi8Reuhr31S9TVngnfJeaI0g.png?1600986149)
Once this process has finished, you can take control of the "flip" through settings: