Having a problem of using a local image

Hi, I am having a problem of using a PNG image from my local directory. For example, the Logo does not show up if I use a downloaded image:

logo = “”"<img src="./logo_stacked.png" # I downloaded it to my local directory
width=150 height=127 align=“left” margin=20px>"""

However, it works fine and the Logo shows up when using a linked image:

logo = “”""""

Thanks for your help!