Centos 7 + Centreon + Nagvis - en Nagvis al entrar en Manage Backends , me da el siguiente error:

[JuanjoMontes]

Invalid JSON response
Time: 1707429821
URL: /nagvis/server/core/ajax_handler.php?mod=MainCfg&act=manageBackends&_ajaxid=1707429821
Response:

{"type":"error","message":"Error: (0) Trying to access array offset on value of type null
URL: /nagvis/server/core/ajax_handler.php?mod=MainCfg&act=manageBackends&_ajaxid=1707429873
\nFile: /usr/lib/nagvis/share/server/core/classes/ViewManageBackends.php
\nLine: 98
\n#0 /usr/lib/nagvis/share/server/core/classes/ViewManageBackends.php(98): nagvisExceptionErrorHandler()
\n#1 /usr/lib/nagvis/share/server/core/classes/ViewManageBackends.php(273): ViewManageBackends->defaultForm()
\n#2 /usr/lib/nagvis/share/server/core/classes/CoreModMainCfg.php(53): ViewManageBackends->parse()
\n#3 /usr/lib/nagvis/share/server/core/functions/index.php(120): CoreModMainCfg->handleAction()
\n#4 /usr/lib/nagvis/share/server/core/ajax_handler.php(59): require('...')
\n#5 {main}</code>Output:

Default Backend<\/h2>\n\n\n\n

Default Backend<\/td>

<\/pre>","title":"Error: PHP Error"}