IDE 2.3.4 show library Installed / Processing but never finish

[ptillisch]

I have encountered this problem myself, and there have been a couple other reports of it as well:

IDE & Library update in the same time

Hi, I had an IDE update from 2.3.3 to 2.3.4 and at the same time libraries wanted an update. I agreed to the IDE update, IDE restarted and then 2 libraries update processes came at the same time and wanted to start. ??? Of course they interfered with each other. Waiting did not help. I closed the IDE and then the libraries were installed. I experience this very often that suddenly a window opens twice at the same time for an update of the libraries. You can't seem to get a handle on it.

How many libraries is too many libraries?

FYI, I'm currently using Arduino IDE 2.3.4. Every time I open the IDE, it automatically wants to go to updates, but it keeps getting hung up on Processing FastLED:3.9.7: Installed FastLED@3.9.7 Updating libraries... Downloading index: package_jolly_index.json It has already installed FastLED@3.9.7 a number of times, but it seems like the system is getting hung up and not completing. While all of this is going on, if I open the Library Manager, there is nothing there: I suspect it must wipe …

However, in the other reports, the problem is specific to the "UPDATE ALL" button and doesn't occur when the libraries are updated individually. So at least we had a workaround for the bug.