Hi @ElisabettaPi , Hope you are doing well! Did you try using List of Group type to target the shop owners? Here is the documentation for implementing List: Creating and managing lists | Adobe Campaign Thanks,Pallaveeka

Hi @MikeEsc98 ,Hope you are doing well!If you have already validated your mc user credentials and IP whitelisting, then you should consider checking the web log errors on RT (execution instance) for more details. The web logs on RT instance will have more errors which will indicate the factor causin...