Invalid feed on local instance

[AndreeaCristinaRadacina]

Description

A user reported that his feeds became invalid four days ago. I tested them on the feed validator, and they are still valid.

I tested both feed sources on my local instance and on Tastewp. In my instance, I get the invalid error, but on Tastewp, it works as expected.

I also tested it on SimplePie, but got an error - https://simplepie.org/demo/?feed=https%3A%2F%2Fwam.ae%2Far%2Frss%2Ffeed%2Fg4t5vub96x%3Fslug%3Denglish-rss-viewnull%26vsCode%3Davs-001-1jc74qmeu0pl%26type%3Drss.

Rolling back didn't help.

Step-by-step reproduction instructions

1. Test on a local instance a Feedzy importing using this feed: https://wam.ae/ar/rss/feed/g4t5vub96x?slug=english-rss-viewnull&vsCode=avs-001-1jc74qmeu0pl&type=rss
2. Test on TasteWP too.

Screenshots, screen recording, code snippet or Help Scout ticket

Local instance:

TasteWP:

ref: https://wordpress.org/support/topic/rss-import-5/#post-17870804

Environment info

No response

Is the issue you are reporting a regression

No.