slashdot.org feed stopped working - "internal server error"

[mehturt]

The URL should be http://rss.slashdot.org/slashdot/classic and was working fine for a long time.
In the log file I have:

Error while parsing feed: http://rss.slashdot.org/slashdot/classic {"class":"FeedIo\Reader\ReadErrorException","message":"internal server error","code":0,"file":"/var/www/nc_home_31.0.5/apps/news/vendor/debril/feed-io/src/FeedIo/Reader.php:81","trace":"
#0 /var/www/nc_home_31.0.5/apps/news/vendor/debril/feed-io/src/FeedIo/FeedIo.php(126): FeedIo\Reader->read()\n
#1 /var/www/nc_home_31.0.5/apps/news/lib/Fetcher/FeedFetcher.php(141): FeedIo\FeedIo->read()\n
#2 /var/www/nc_home_31.0.5/apps/news/lib/Service/FeedServiceV2.php(320): OCA\News\Fetcher\FeedFetcher->fetch()\n
#3 /var/www/nc_home_31.0.5/apps/news/lib/Service/FeedServiceV2.php(422): OCA\News\Service\FeedServiceV2->fetch()\n
#4 /var/www/nc_home_31.0.5/apps/news/lib/Service/UpdaterService.php(63): OCA\News\Service\FeedServiceV2->fetchAll()\n
#5 /var/www/nc_home_31.0.5/apps/news/lib/Cron/UpdaterJob.php(58): OCA\News\Service\UpdaterService->update()\n
#6 /var/www/nc_home_31.0.5/lib/public/BackgroundJob/Job.php(61): OCA\News\Cron\UpdaterJob->run()\n
#7 /var/www/nc_home_31.0.5/lib/public/BackgroundJob/TimedJob.php(97): OCP\BackgroundJob\Job->start()\n
#8 /var/www/nc_home_31.0.5/lib/public/BackgroundJob/TimedJob.php(84): OCP\BackgroundJob\TimedJob->start()\n
#9 /var/www/nc_home_31.0.5/cron.php(170): OCP\BackgroundJob\TimedJob->execute()\n#10 {main}","previous":{"class":"FeedIo\Adapter\ServerErrorException","message":"internal server error","code":0,"file":"/var/www/nc_home_31.0.5/apps/news/lib/Fetcher/Client/FeedIoClient.php:71","trace":"
#0 /var/www/nc_home_31.0.5/apps/news/vendor/debril/feed-io/src/FeedIo/Reader.php(75): OCA\News\Fetcher\Client\FeedIoClient->getResponse()\n
#1 /var/www/nc_home_31.0.5/apps/news/vendor/debril/feed-io/src/FeedIo/FeedIo.php(126): FeedIo\Reader->read()\n
#2 /var/www/nc_home_31.0.5/apps/news/lib/Fetcher/FeedFetcher.php(141): FeedIo\FeedIo->read()\n
#3 /var/www/nc_home_31.0.5/apps/news/lib/Service/FeedServiceV2.php(320): OCA\News\Fetcher\FeedFetcher->fetch()\n
#4 /var/www/nc_home_31.0.5/apps/news/lib/Service/FeedServiceV2.php(422): OCA\News\Service\FeedServiceV2->fetch()\n
#5 /var/www/nc_home_31.0.5/apps/news/lib/Service/UpdaterService.php(63): OCA\News\Service\FeedServiceV2->fetchAll()\n
#6 /var/www/nc_home_31.0.5/apps/news/lib/Cron/UpdaterJob.php(58): OCA\News\Service\UpdaterService->update()\n
#7 /var/www/nc_home_31.0.5/lib/public/BackgroundJob/Job.php(61): OCA\News\Cron\UpdaterJob->run()\n
#8 /var/www/nc_home_31.0.5/lib/public/BackgroundJob/TimedJob.php(97): OCP\BackgroundJob\Job->start()\n
#9 /var/www/nc_home_31.0.5/lib/public/BackgroundJob/TimedJob.php(84): OCP\BackgroundJob\TimedJob->start()\n#10 /var/www/nc_home_31.0.5/cron.php(170): OCP\BackgroundJob\TimedJob->execute()\n#11 {main}"}}

[mehturt]

Must have been something in the file, because today I don't see the issue anymore (the issue was observed for a few days, less than a week).