wikitools.wiki.Wiki for biografias.bcn.cl: Invalid JSON about wikitools

[nemobis]

Same in a MediaWiki 1.34 wiki:

Python 2.7.16 (default, Oct 10 2019, 22:02:15)
[GCC 8.3.0] on linux2
Type "help", "copyright", "credits" or "license" for more information.
>>> import wikitools
>>> site = wikitools.wiki.Wiki("http://luz.izt.uam.mx/wikis/mediawiki/api.php")
Invalid JSON, trying request again
Invalid JSON, trying request again
Invalid JSON, trying request again
Invalid JSON, trying request again
HTTPError: HTTP Error 301: The HTTP server returned a redirect error that would lead to an infinite loop.
The last 30x error message was:
Moved Permanently trying request again in 5 seconds
HTTPError: HTTP Error 301: The HTTP server returned a redirect error that would lead to an infinite loop.
The last 30x error message was:
Moved Permanently trying request again in 10 seconds
HTTPError: HTTP Error 301: The HTTP server returned a redirect error that would lead to an infinite loop.
The last 30x error message was:
Moved Permanently trying request again in 15 seconds