Some feeds are not feeding

Hello,

We need your help for finding the exact reason.The problem is:
the plugin “WP RSS Aggregator”, the following feeds are not feeding (while other feeds are feeding)
https://canadabusiness.ca/rss/
https://www.thelienzone.com/feed/
https://www.constructionleadingedge.com/feed/
https://www.coatingsworld.com/feedcreator/rss/2647/5
https://news.ontario.ca/mohltc/en/rss/news.rss
https://www.statcan.gc.ca/eng/sc/rss
https://www.fminet.com/news/rss?id=1
https://www.reminetwork.com/feed/

Thanks

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