which, again, never progresses or finishes. This last remains on screen even though I clicked on the close 'X' and I can't get rid of it.
I also just noticed I cannot open more than one sketch. Clicking on 'open recent' and making a selection has no effect whatever. Going directly to 'open' and selecting from there doesn't work either. Selecting from the 'sketchbook'
Hi @dougp. It was found that Arduino IDE 2.3.3 has a bug that causes this to happen when you have Serial Monitor open.
The workaround is to close the Serial Monitor view until the index download process is finished. After that, you can open Serial Monitor again.
The Serial Monitor view is a tab in the bottom panel of the Arduino IDE window, so you might not even notice when you have it open. You can close it by clicking the X icon on the tab:
The Arduino developers have already fixed the bug, but that fix was made after the time of the Arduino IDE 2.3.3 release so this is why you still experience it with 2.3.3. Likewise, the fix has not yet propagated to the Arduino IDE nightly builds. But at least the completion of the fix means that the problem will not plague the users of the next release of Arduino IDE.