Notifications to sellers in the Ubercart marketplace

Hello Ivan, good day! I apologize for the disturbance, but I have a question. I purchased your SP website build and I'm trying to integrate the Ubercart marketplace with it. However, after doing so, users are unable to create albums (sections) and are redirected to a blank page. The second issue is that when I install the module on a clean core, everything works fine, but there's one problem: different sellers do not receive email notifications about completed orders, only the admin does. Additionally, sellers can only see their orders after the admin assigns them a "complete" status. My question is whether it's possible to resolve this issue: to have email notifications sent to sellers and for them to see the orders of their sold products without admin intervention. Also, I would like to understand why adding sections doesn't work when integrating this module with your SP build. I'm interested in the cost of this solution and whether you can handle it yourselves or provide consultation. Best regards, Alexey.