[Amazon Plugin] Not returning metadata

[pugsley1]

There seems to be a recent issue with the Amazon plugin. No metadata is returned.

Sometimes get this error message in log file:

calibre.ebooks.metadata.sources.amazon.CaptchaErro r: Amazon returned a CAPTCHA page, probably because you downloaded too many books. Wait for some time and try again.

In other cases, it does not return results even when the book is listed on the Amazon site:

"****************************** Amazon.com (1, 3, 15) ******************************
Found 0 results
Downloading from Amazon.com took 9.513411045074463
User-agent: Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/140.0.0.0 Safari/537.36
Server: amazon
Downloading details from: https://www.amazon.com/dp/B0FJ643YMP
Failed to make identify query: 'https://www.amazon.com/s/?search-alias=aps&unfiltered=1&sort=relevanceexprank&field-keywords=B0FJ643YMP'
Traceback (most recent call last):
File "calibre\ebooks\metadata\sources\amazon.py", line 1521, in search_amazon
File "mechanize\_mechanize.py", line 241, in open_novisit
File "mechanize\_mechanize.py", line 313, in _mech_open
mechanize._response.get_seek_wrapper_class..httper ror_seek_wrapper: HTTP Error 503: Service Unavailable "

In either case, results seem independent of what country or servers are chosen.