Check the apache error_log, this looks like the page is failing to execute half way through. The reason will be in the error_log

Adam.

From: observium <observium-bounces@observium.org> On Behalf Of Edvinas Kairys via observium
Sent: 30 June 2021 12:01
To: Observium <observium@observium.org>
Cc: Edvinas Kairys <edvinas.email@gmail.com>
Subject: [Observium] alert checkers windows after migration to new server is blank

Hello,

After migration to new service, using mysql dump and then restore, on the new server i see alert checkers windows blank, even the page source displays the alerts. Any clues ?

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