Fault connector and screen component are two features that can be used to address the issue of users seeing error messages when they use one of their screen flows. Fault connector can be used to handle errors that occur when a flow element fails, such as a record create or update element. Screen component can be used to display a message to the user with text explaining what went wrong and how to correct it. References:
https://help.salesforce.com/s/articleView?id=sf.flow_ref_elements_connector_fault.htm&type=5 https://help.
salesforce.com/s/articleView?id=sf.flow_ref_elements_screencmp_display_text.htm&type=5