Try adding the following to your config.php:

// Basemap provider (CARTO now watermarks unkeyed tiles and 26.8 has no key support)

$config['frontpage']['map']['tiles'] = 'esri-worldgraycanvas';

then:

systemctl reload php-fpm

Thanks

From: ARNOLDO RODRIGO VIDAL BRAVO via observium <observium@lists.observium.org>
Sent: 31 August 2026 20:20
To: Observium <observium@lists.observium.org>
Cc: ARNOLDO RODRIGO VIDAL BRAVO <arnoldo.vidal@pucv.cl>
Subject: [External] [Observium] api key

<CAUTION - From External Source>

hi, i have observium  25.10.14367 and it is working  perfectly, but a few days in the map show API KEY REQUIRED, i repeat observium works fine.
now how i cam do to these message not show to another users on my lan?

--Saluda cordialmente