Another question before we buy.
How does Attachment control work?
I add it to my test form but on new we can not chose files to upload. From control we can see only Name.
Isn't it available for Sharepoint 2019 on-premise environment? Or maybe after activation - not in trial period?
I suppose you've added the Attachment field from the Common fields section. This field type is not supported in SharePoint 2019.
Please add Attachment field from the SharePoint fields section:
Ok. Thank you for quick response.