This probably could be an issue in grants! If it’s an end-user try checking whether the relevant projection is granted in the Projection & Lobby pages window.
This shows the permission set that the project is granted and then users who has the permission set, if your end user isn’t listed please add & recheck.
Hi Are these the API projection names as I am receiving the below error for Projection: SupplierHandling
“Unable to browse connector: Projection not found, or not Included in Compatibility Application Type”
If you are trying to perform an integration, you might want to include the SupplierHandling projection as a compatibility application type. Navigate to "API Explorer" page (App10 UPD8 upwards) and perform the following,