Nagvis Map Error: Syntax Error Invalid JSON response

[Marvin4321]

Hallo, Just installed Nagvis map on Almalinux 8 and when im trying to get in the Options -> General Configurations i get this message:

Invalid JSON response Time: 1669966597 URL: /nagvis/server/core/ajax_handler.php?mod=MainCfg&act=edit&_ajaxid=1669966597 Response:

	{"type":"error","message":"Error: (0) htmlentities(): Passing null to parameter #1 ($string) of type string is deprecatedURL: /nagvis/server/core/ajax_handler.php?mod=MainCfg&act=edit&_ajaxid=1669966597\nFile: /opt/moso/share/nagvis/share/server/core/functions/html.php\nLine: 29\n

#0 [internal function]: nagvisExceptionErrorHandler() \n#1 /opt/moso/share/nagvis/share/server/core/functions/html.php(29): htmlentities() \n#2 /opt/moso/share/nagvis/share/server/core/classes/ViewEditMainCfg.php(187): escape_html() \n#3 /opt/moso/share/nagvis/share/server/core/classes/ViewEditMainCfg.php(100): ViewEditMainCfg->renderSection() \n#4 /opt/moso/share/nagvis/share/server/core/classes/CoreModMainCfg.php(47): ViewEditMainCfg->parse() \n#5 /opt/moso/share/nagvis/share/server/core/functions/index.php(120): CoreModMainCfg->handleAction() \n#6 /opt/moso/share/nagvis/share/server/core/ajax_handler.php(59): require('...') \n#7 {main}</code>Output:

\n\n\n\n

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