Some pages in brohoof.kilorat.com:8880 were errored as HTTP 521 in 2020-12; that site was partly offline in 2020, now in current year it's basically totally down as HTTP 523. Example from "brohoof.kilorat.com-8880-forums-2020-12-20-6f6042f2-00009.warc.gz":
>WARC-Target-URI: http://brohoof.kilorat.com:8880/forums/topic/9439-how-high-can-you-count-before-an-admin-posts/page-280
>WARC-IP-Address: 172.67.197.189[...]
>Content-Length: 756
>WARC-Warcinfo-ID: <urn:uuid:8b3a8de7-b5b2-450b-8d97-09ee4399957a>[...]
>HTTP/1.1 521 Origin Down
>Date: Mon, 21 Dec 2020 08:28:39 GMT
>Content-Type: text/html

"how-high-can-you-count-before-an-admin-posts" - sounds off topic. brohoof.kilorat.com did have an off topic section of the forums, for stuff like "look at this interesting outdoorsy video - 'Can I Survive Alaskan Winter with No Sleeping Bag, No Tent & No Tarp?' at https://iv.ggtyler.dev/watch?v=qRODjitiKP8 ."

>>9375
>downloader
Don't ignore IDs by status in TPA - replace

cat s.txt | xargs -d "\n" sh -c 'for args do wget --spider \
--no-verbose "https://tpa.mares.workers.dev/?output=html&id=$args" -o temp.txt; cat temp.txt >> 1plist2.txt; done' _; rm temp.txt; grep -v '!!!\| 200 OK$' 1plist2.txt | sed "s/.*=//g" | sed "s/://g" > 1plist3.txt; ids=1plist3.txt; utc | tr -d \\n >> 1stats1.txt; echo " check other site done" >> 1stats1.txtp

with

cat s.txt > 1plist3.txt; ids=1plist3.txt

>rsync error
same error if 20 minutes late on entering the password