When android multisig wallet electrum sends coin, it says "Partially signed" with a QR code. I scanned that QR with another android electrum on the send tab. It says "wrong UPE" or something. I also scanned that with my desktop electrum (using load transaction..) It says "unable to parse".
wrong UPE: the scanner recognized it as a barcode, not a qr code. retry, holding your camera well aligned.
"unable to parse": maybe the desktop version is to old?