I need to import a customizations file from another system. I load up
customizations file, it shows me many entities in the list, I click on the
Import All Customizations button, the "Importing Customizations" dialog comes
up and stays forever with the Ok button disabled (well, at least for more
than 4 hours). Same happens if I select just one entity from the list and use
the "Import Selected Customizations" option.

What am I doing wrong? Thanks!