Twilio - send text message (Attachment Image URL not working)

I’ve been using twilio on a project to send text messages for a while but now I need to send images. I tried putting the image url in the attachment image URL option but when I do the messages don’t send. I’m not sure if this is a twilio account thing (I’m not the owner of the account I’m just an employee using the app creator’s account) or if I’m doing it wrong. For reference, this is what it currently looks like:

twilio image URL

And this is what the url getting passed looks like:

Any pointers as to what I might be doing wrong is appreciated.

Is the URL clickable in the text message? I’m not 100% sure on this but it may be the case that all it is capable of doing is sending a link and not actually displaying the image.

I’m not sure, the problem is that when I try to include the URL it won’t even send a text message.