NagVis NOT working after upgrade from 2.3.0p17 to p18

Troubleshooting
,
1

CMK version: 2.3.0p17
OS version: Rocky Linux 9.5 (Blue Onyx)

**Error message: NagVis Maps: LogonMultisite: not authenticated **

From a fresh install of Rocky Linux 9.5 (Blue Onyx) and updated.
And a fresh install of check-mk-raw-2.3.0p17…

NagVis Maps checkmk 2.3.0p17 Working!

Config checkmk 2.3.0p17 (and 2.3.0p18) [omd config show]

ADMIN_MAIL:
AGENT_RECEIVER: on
AGENT_RECEIVER_PORT: 8000
APACHE_MODE: own
APACHE_TCP_ADDR: 127.0.0.1
APACHE_TCP_PORT: 5000
AUTOSTART: on
CORE: nagios
LIVESTATUS_TCP: off
MKEVENTD: on
MKEVENTD_SNMPTRAP: off
MKEVENTD_SYSLOG: off
MKEVENTD_SYSLOG_TCP: off
MULTISITE_AUTHORISATION: on
MULTISITE_COOKIE_AUTH: on
PNP4NAGIOS: on
TMPFS: on

Upgrade to 2.3.0p18 and NagVis Maps is NOT WORKING!!!
(LogonMultisite: Not authenticated.)

NagVis maps Edit button opened independently…

It seems like a recurring call
imagen

I hope this could be fixed.

[As this is my first post here: Many thanks for this really great piece of software!]

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2

Check if you have the entry in the /etc/hosts file:

127.0.0.1 localhost
::1 local server

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3

NagVis needs to be able to talk to the Checkmk API for authentication.
This was done differently before, hence it pops up now.
As @a3093 wrote, you need to make sure, that localhost is accessible for the software.
Also double-check if you are using any reverse proxy or similar system, which might interfere here.

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