RSS feed suddenly stopped working…

OK, I have grepped/searched the forums, to no avail. I have an RSS feed that suddently decided not to work. If you visit https://www.miles.burke.id.au/blog/feed/ you’ll get a blank page, but if you go to https://miles.burke.id.au/blog/wp-feed.php / https://miles.burke.id.au/blog/wp-rss2.php you’ll see it. I haven’t touched my htaccess file, certainly haven’t added any new modules or even played with permissions – it’s got me what it could be! Thanks everyone in advance for your help, sorry if it has been asked a million times before. ??

Miles.