1) we canīt see your file but the infamous white pixel, so rename it or zip it or print it so the paranoid server does not block it with the excuse: "a guest with the same credentials is already inside so you must be fake"
2) ok, where does you mystery resistor go from , to?
Acrobat reader has a "snapshot tool" which nobody uses, it allows you to select an area and when you lift your finger, copies and sends it to the clipboard , then you can paste it as anew image on any graphics package (even humble Paint), edit/write/whatever on it and save it as gif/jpg/png which you can then attach here to your answer.
FWIW what I used to post the corrected Balder schematic as .jpg , main idea being that it appears straight inside the message window and is editable by anybody.
And f*ck pinterest, photobucket, google cloud, etc.