Welcome to Android Central! That's an EIGHT year old phone, and the highest Android version it ever got was Lollipop, so it's probably time to get rid of it, since you'll find fewer and fewer apps compatible with such an old version (and it's also much less secure than more current versions of Android).
That being said, did you read through this thread? Have you already tried clearing the app cache for Blinkfeed in Settings>Apps, then force stopping it? If that doesn't work, try also clearing the app data for Blinkfeed.