Some, if not all, wikis have their pageview statistics empty for last two days (2024-02-17 and 2024-02-18).
See the default homepage of viewer tool: https://pageviews.wmcloud.org/?project=en.wikipedia.org&platform=all-access&agent=user&redirects=0&start=2024-01-29&end=2024-02-18&pages=Cat%7CDog
Direct API access to get 2024-02-17 (two days ago) stats https://wikimedia.org/api/rest_v1/metrics/pageviews/per-article/en.wikipedia/all-access/user/Cat/daily/2024021700/2024021700:
The date(s) you used are valid, but we either do not have data for those date(s), or the project you asked for is not loaded yet. Please check documentation for more information
Reported on:
https://meta.wikimedia.org/wiki/Talk:Pageviews_Analysis#February_17th_and_18th_down_to_zero_on_Wiki.pt
https://fr.wikipedia.org/wiki/Wikip%C3%A9dia:Le_Bistro/19_f%C3%A9vrier_2024#Statistiques_de_consultation