Not a valid Base-64

Greetings, I am trying to display a gif type image that is based on the Image component but gives me the errror:
“System.FormatException: The input is not a valid Base-64 string as it contains a non-base 64 character, more than two padding characters, or an illegal character among the padding characters.”
I have tested the string and if it generates an image correctly.
This is the code I am using:

Please Helpme

Fuse currently does not support showing GIF images. Try another file type, such as PNG and it should be alright.