177: Target text missing

You used the hash #, which marks a target that can be linked to, at the start of a caption of some kind. Targets are required to contain at least one printable character, which your target does not. Aneamal marks such as ~ do not count as printable characters in this context.

Solution

Append text to the hash # to create a target:

[i]->bunny.jpg
#Rabbit

If you did not mean to create a target, but want to use a literal hash #, you can prepend a backslash: \#