Since 2 weeks ago twitter cards doesn’t work on my articles. Twitter cards meta tags are the same and we haven’t done any code changes on our site but when I test any article on Card Validator the following error appears:
ERROR: Fetching the page failed because other errors.
Here an article from my site: https://uilca.it/news/29-11-2018/renato_carlo_bianchi_nuovo_dirigente_sindacale_uilca/
How can I solve it?