After some extra research, I found that in FreePBX 15 and up, failure of the https://mirror1.freepbx.org/lechecker.php script will not throw an error, but will be stored as “hints” and it won’t cause the rest of the function updateLE() to stop [1]. The hints aren’t shown in the GUI, only full errors [2]. So even though you don’t see it, there is definitely an issue on https://mirror1.freepbx.org/lechecker.php which I will log a bug report for and hopefully they will fix. Thanks for your comments.