Hey there,
Apologies for the delayed response!
Missing results can significantly impact your grades, compared to minor errors. Please look at the rubric/ handbook for your dissertation. It will give a clear idea of what is expected to get a 2:1 in your dissertation. If your dissertation has a strong base with a comprehensive literature review and methodology section, missing results might just slightly affect your grades. However, it depends on the requirements to achieve a 2:1. Hope this helps!
Cheers,
Shri (MSc International Business Student).