1. I believe cloudflare or something else may be preventing the upload of images. When faced with this box:
and attempting to upload an image from my computer, I click "Upload, but the image never appears. Thus I must resort to using an external site to host the image.
Note that the uploaded images do appear in my "Manage Attachments" area.
2. When using the above's "From URL" tab, I get an "invalid URL" error message. I can paste the URL directly into my browser and retrieve the correct image. Picture above was posted by manually inserting the IMG tags.