@Kri 

Can you share more details how you are trying to embed the image in report ?

I would recommend you to follow below article to embed the image in report and it should work

https://www.servicenow.com/community/platform-analytics-articles/embed-reports-as-images-in-a-schedu...

If this helped to answer your query, please mark it helpful & accept the solution. 

Thanks,

Bhuvan