problem in xf 2.1.7 template "alert_post_reaction"

problem in alerts of xenforo.

When someone reacts to my content, it appears in the alert list.
until there everything is correct.
but if I enter the list of alerts, the link of the message, topic or resource that the user has liked does not appear.

in alerts it says the following
user reacted to thread (link) with (reaction).

Now the link does not appear. Only plain text.

What could be the problem?

Thanks