On a Laptop and using Opera browser
This is one of the images I tried to upload to the gallery
On selecting Add Photo a standard post dialogue box is presented for the captions, but the process allows only upload from file folder options, not URL options.
For now I posted links to the pics in the post (although they track the reader off site), rather than attach or embed the photos in the actual post.
Also when trying to submit this reply first time round, I got a 500 error
Internal Server ErrorThe server encountered an internal error or misconfiguration and was unable to complete your request.
Please contact the server administrator, you@example.com and inform them of the time the error occurred, and anything you might have done that may have caused the error.
More information about this error may be available in the server error log.