I am also facing similar issue & seeing notication in Andorid phone. Basically seeing Approval screen and when I click on "Approval Screen" link from the notifcation window then it redirects to a new page "access.line.me" which seems to be broken link as it does not loads the page.
I've been folowing an official tutorial and so I've added bot and webhook.
I am stuck after adding my bot as friend on my personal phone's account.
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