Hi Dominik,
Likely your project has references in the smart-build templates that reference the OPTIONS and MENUS page and/or menu ID.
You can check the BUILD.webpagetemplate in folder Templates/Smart Build and other templates in that folder for the use of these.
Possible solutions are to create the pages and menu's that are referenced, or remove the references from the templates.
If you need additional help it would be best to create a support ticket so our technical support can assist you with that.
Regards,
Roger van Valen