iconName = "https://xyz/icon.png"
You must be connected to the internet and not have "Hotlinking" the hosting.
I tried in on my dropbox... there is no more skipping missing icon indication:
https://www.dropbox.com/s/7201jhgggngxbok/music.png?dl=0
[java]
[java] Extensions : Generating files [jml.JmlPhoneCall]
[java] Extensions : Copying file jml\JmlPhoneCall\JmlPhoneCall.class
[java] Extensions : Successfully created jml.JmlPhoneCall build info file
[java] Extensions : Successfully created jml.JmlPhoneCall extension properties file
[java]
but my extension have no icon !!
There must be a direct link, no authentication required.
and where can i put it to have no authentication ?
Free hosting https://byet.host/
...but if the account has no traffic, they delete the account and users will not be able to see your icon.
Skipping missing icon again
because if i use this the icon is not in the aix ? it try to find it on internet ?
In community :).
I don't kwnow how tou do that: https://community.appinventor.mit.edu this is the forum, but how do you acces uploads ?
See how, mouse right click
Paste this link into the java code. This is the link to your icon that you inserted a few posts above.
https://community.appinventor.mit.edu/uploads/default/original/3X/0/7/07664ec9712286fc03c75bdfda413b4c5b9a1a5c.png
ok. I got it !
it works, even if it is a stange way to do it...
thanks
try
aiwebres\logo.png
instead of
aiwebres/logo.png 
I already tried it , and aiwebres\\logo.png
aiwebres\\\logo.png
aiwebres//logo.png
none works
With "\" does not compile. Are you working on Windows?
just use aiwebres/logo.png
[java]
[java] Extensions : Generating files [jml.JmlPhoneCall]
[java] Extensions : Skipping missing icon aiwebres/logo.png
[java] Extensions : Copying file jml\JmlPhoneCall\JmlPhoneCall.class
[java] Extensions : Successfully created jml.JmlPhoneCall build info file
[java] Extensions : Successfully created jml.JmlPhoneCall extension properties file
[java]
I just guess