HI @Rut7 ,
You will be getting this error, when you try to create a new campaign by not selecting 'campaign template'
![ParthaSarathy_0-1698383792485.png ParthaSarathy_0-1698383792485.png](https://experienceleaguecommunities.adobe.com/t5/image/serverpage/image-id/65334iD7D8E6193CFEA54A/image-size/medium?v=v2&px=400)
Selecting template is mandatory.
Same kind of error can be found when you try to create a new workflow without selecting a workflow template,
![ParthaSarathy_0-1698385044421.png ParthaSarathy_0-1698385044421.png](https://experienceleaguecommunities.adobe.com/t5/image/serverpage/image-id/65335i2F6B8B124816A827/image-size/medium?v=v2&px=400)