Reply To: Could not wake modem for clock sync

That sounds like there’s probably an error in your code that is causing one or more missing functions calls to give an error when compiling.  Have you tried compiling the example sketch exactly as it’s written on that github page I linked above, with no edits at all?  If you’re successful in compiling that example, then compare your edited sketch to the example line-by-line and see what’s causing the error.