Trying to open an aura component or app on a tab in lightning using custom url button to launch and lightning:isurladdressable. But the error says page isn't available.
<aura:component controller="ACRCloneActionCompController" implements="lightning:isUrlAddressable,flexipage:availableForAllPageTypes">
<!--code here-->
</aura:component>
custom url launched on via custom button is: /lightning/cmp/c__acrCloneActionComp?c__acctid={!Account.Id}