Is this caused by a problem with the Python code generated by WEB IDE?
I am ble to open the file in UIflow desktop IDE (1.7.4) , but it defaults to Python tab. WHen I switch to Blockly iut stated Blockly will not support generated python, but everything seems ok in Blocly and I can save the file with new name, AND THEN OPEN IN WEB IDE (1.9.5)