In the Flow the users are getting this error

[avinash1289]

Hi Team,

The requested flow operation was prohibited by security rules.

[Hajar BENJAHHAR]

Hello @avinash1289 , 

The error means that the user has not the right role to create the task. 

To resolve the issue, you can add the appropriate role to the user or to add the role in the section Run with role(s). Please refere to the screenshot. 

Best regards, 

Hajar

[Brad Bowman]

I would recommend changing all flows to Run As System User.  You're going to have other issues if you don't, and I haven't heard of any good reason to do otherwise.