Yes it is a multisite WP, i am the only user so i am logging with the same email to all sites. this site is built on subdomain from the mail domain. On the main domain i had the same issue with this application (registree attendance).
I installed this plugin on sunday so it hardy update issue. I have updated it manually though. Please see pictures I have provided and let me know what can I do, i changed site’s language to english thinking it might resolve the issue, but no.