Hi @MohitPowerBI ,
It is recommended to specify Entity from the Entity Name drop-down list.
If there is no corresponding option in the list, you can manually enter the Entity Name by clicking Enter custom value. Here you need to ensure that the corresponding Entity does exist.
You can do the following test, configure the same content in the List records action to see if the action can be executed normally. If not, then check whether the Entity Name is valid.
Best Regards,