Publishing error - Path not valid

Good day community, please could someone assist me:
I am getting an error when trying to publish, saying the path of a specific image is not valid, that it cannot contain more than 247 characters or any special characters:

When I view the media library, I do not see this image - but I do find it in an older published SCORM zip file.

I received this existing .story file from the client and did not build it myself, plus I am a novice when it comes to Storyline, so I don't know how to go change or remove that file within my project, if it does not register in the media library?

Another thing, the file does not seem to contain special characters, and the amount of characters count up to 52, so why the error?

Two project files are giving this error, the rest have been fine up to this stage.

Looking forward to your response!