The above error code 30015 11 primarily appears when you try to open the Office program on Windows 10 computers that are previously running on Windows 8.1. It has been observed that this error needs to repair or reinstall and you can read the below information for more knowledge.
Disclaimers: Before you attempt to fix the Microsoft office issue, we highly recommend taking a registry back up and set a system restore point. Because this process involves repair on registry and changes. In case if something goes wrong during this process, we can revert back the settings and we can does a system restore? Also, save your documents, emails, spreadsheets, and office related files and back It up.
(In case if you not sure how to back up, consult the Experts to help you)