Thanks for sharing your error information, definitely something to address in the future (improve error handling for this particular error type). I'll be happy to help you, but please be careful about posting your information publicly, someone can start using your weather underground API key and cause issues for you down the road.
Such detailed information can be emailed me directly to firstname.lastname@example.org and I'll be more than happy to assist you, meanwhile I encourage you to edit your post (look for a little pencil icon at the bottom of your post) in order to delete your actual URL and anywhere else you mention your API key or pwsweather password.
That being said, lets figure this out.
I'm not quite sure what you mean by your handle, "WU_0339***", could you elaborate on that?
I also see that you have seemingly already figured out what went wrong: your wuID should have been "wuID=KPAB****" (use real data instead of stars, I use them for your privacy).
Your pwsweather station appears to be updating so you, or someone on your behalf, has already setup the cron-job and everything is moving along nicely (if it was not you who set this up, let me know).
One issue I do see is that your pwsweather station was setup with an incorrect GPS coordinates (which is different from the address). This will initially make it impossible to find it within Rachio interface, but it will also screw up your rainfall data, such as another user has discovered (link).
Quite frankly I think your easiest solution at this time would be to create a new station with your pwsweather account, this time making sure you specify the location correctly (look for click here to use google maps option).
Keep in mind you do not have to name it the same as the name of Weather Underground station you are getting data from. What ever name you pick will go into "pwsID=..." section. Please make sure not to have any spaces after the "=" sign.
Update your cron-job with a new URL and remember, if you run into any problems or require assistance, please email to email@example.com.