Error: (0) json_encode(): Invalid UTF-8 sequence in argument

[busintegration01]

Hi

We´re migrating from Nagios Core 4.3.4 to Nagios XI 5.5.9. We use NagVis 1.9.8 with Nagios Core. Maps are imported succesfully, but if we open some maps it appears the next message:

Error: (0) json_encode(): Invalid UTF-8 sequence in argument
URL: /nagvis/server/core/ajax_handler.php?mod=Map&act=getMapObjects&show=MAP-CreadoOP&header_menu=1&hover_menu=1&context_menu=1&zoom=100&_ajaxid=1549435467
File: /opt/nagios/nagvis/share/server/core/classes/NagVisMap.php
Line: 116

We have observed that error maps they have output alert with special characters (spanish accent mark).
PHP.ini configuration is the same in Nagios Core and Nagios XI. In Nagios Core Works fine, but not in Nagios XI.

Can you help me?

Thanks

[ssax]

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