Cannot connect to a Nano but works well with the Java IDE

As the title says I have a Nano with CH340G and 168 that connects properly to Arduino Java IDE but not to Arduino online editor, it does not detect the board "Error uploading, check if the selected board is currently available".

I am using the same computer and exactly the same board options (Arduino Nano 168). I can connect with the online IDE correctly to a UNO so it shouldn't be something on my computer.

Another interesting thing is that if I select a UNO board with the Nano it seems to detect it and tries to upload the sketch (but it fails during the transmission).

Are you also selecting the FLAVOUR as 168 ?

CH340/341 is supported.

There is no OLD BOOTLOADER option for the 168 but I am unsure if that would be an issue.

Bob.

Yes, both flavors are set as 168, and the option of the bootloader is not there but neither on the IDE and it works fine.

What can I provide to help you? The COM logs?

Start CREATE in DEBUG mode.

Right click the CREATE icon and select DEBUG CONSOLE.

A web page should open with almost nothing on it.
Just MINIMISE that for the moment.

Now open CREATE as normal and proceed to do what you were doing before to try the upload.

When it fails close the IDE but NOT the debug window !

Copy and paste the output back here using CODE TAGS ( </> )
If it is too large attach it as a text file.

Other simple things to try are using an INCOGNITO browser window or similar with NO browser add ons enabled.

Turning OFF any additional security you may have for a TEST ONLY.

Clear your browsers CACHE.

Bob.

Ok, I was able to connect using an incognito window. Does that mean that the online IDE has a bug? Ever after connection and downloading a sketch using the incognito window I cannot connect using the normal one.

I guess that if I delete completely the state I will restore the functionality but I'm not sure if you want to debug something in case there is a bug there.

It means you probably have a browser add on that does not play nice with things.

If it is part of a security package you need to add the create site to its exclusions.

If it not a security add on the you need to dump it as it should not be interfering with CREATE in that manner.

Lets start there first.

Bob.

Wouldn't a plugin interfere with the connection of an Uno? I still can connect to the Uno without issues.

So sorry I sort of read that it worked INCOGNITO but not with the regular browsing.

If that was the case it puts it into BROWSER PROBLEM.

If that was not the case and it did not work in either regular or incognito then we are back to getting the debug output.

Bob.