On first installation of IDE and initial startup a warning is shown: "Unable to watch for file changes in this large workspace. Please follow the instructions link to resolve this issue."
It would be advantageous to configure the IDE to have a default workspace that did not trigger this warning. With an empty project one would not expect it to be monitoring for changes of any files. One might expect such a function to be checking if any relevant files have been changed. If this includes all the libraries then it should be configured to handle such a large workspace.
Hi @riban. This is a spurious error caused by a bug in the Theia IDE framework Arduino IDE 2.x is built on. It is not actually caused by a large workspace. You'll find that it occurs sporadically without any definite pattern. I have reported this issue here: