I think they meant ex-former-saintess, as in, she's a Saintess again since she can see the spirits again. Though technically she's been a Saintess the whole time judging by her other apparent abilities, she just couldn't see spirits.
Author confirmed in an announcement here:
https://kakuyomu.jp/users/nitorin/news/16818622174317895165
Thankfully they've confirmed, and have followed through, on continuing to update the WN.
That is so weird. You can feel the missing story. Did everyone share the same bad copy of the RAW, or did the publisher just do a shit job on this one chapter? There's even way less pages than the average of other chapters.