Unable to flash use web flasher?

Theengs OpenMQTTGateway
1

Hi, is there a known issue with the web flasher?

I have been trying now to flash for days, but it just fails.

Now, the serial console window in chrome will not even pop up asking to select a serial port?

Any ideas?

2 
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/manifest.json:1 
        
        
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/manifest.json:1 Manifest: Line: 1, column: 1, Syntax error.
web-install.html:1 Access to script at 'https://unpkg.com/esp-web-tools@3.4.2/dist/web/start-flash-9b1cffdc.js?module' from origin 'https://docs.openmqttgateway.com' has been blocked by CORS policy: No 'Access-Control-Allow-Origin' header is present on the requested resource.
unpkg.com/esp-web-tools@3.4.2/dist/web/start-flash-9b1cffdc.js?module:1 
        
        
       Failed to load resource: net::ERR_FAILED
install-button.js?module:1 Uncaught (in promise) TypeError: Failed to fetch dynamically imported module: https://unpkg.com/esp-web-tools@3.4.2/dist/web/start-flash-9b1cffdc.js?module
web-install.html:1 Uncaught (in promise) TypeError: Failed to fetch dynamically imported module: https://unpkg.com/esp-web-tools@3.4.2/dist/web/start-flash-9b1cffdc.js?module
install-button.js?module:1 Uncaught (in promise) TypeError: Failed to fetch dynamically imported module: https://unpkg.com/esp-web-tools@3.4.2/dist/web/start-flash-9b1cffdc.js?module
manifest.json:1 
        
        
       Failed to load resource: the server responded with a status of 404 ()