i need your help

Cacti works fine,
i installed Weathermap plugin but when i click on whethermap tab, i have a message : echec 401 permission dineid, please contact your cacti administrator.
when i check cacti log, i have messages below :
2024-03-11 11:42:34 - PLUGIN WARNING: Plugin 'weathermap' is attempting to call 'api_plugin_register_realm' improperly in function 'weathermap_config_arrays'
2024-03-11 11:42:34 - PLUGIN WARNING: Plugin 'weathermap' is attempting to call 'api_plugin_register_realm' improperly in function 'weathermap_config_arrays'
2024-03-11 11:42:34 - PLUGIN WARNING: Plugin 'weathermap' is attempting to call 'api_plugin_register_realm' improperly in function 'weathermap_config_arrays'
2024-03-11 11:42:34 - CMDPHP PHP ERROR Backtrace: (/clog.php[27]:include(), /include/auth.php[27]:require_once(), /include/global.php[547]:include_once(), /include/global_arrays.php[2926]:api_plugin_hook(), /lib/plugins.php[85]:include_once(), /lib/plugins.php[85]:CactiErrorHandler())
2024-03-11 11:42:34 - ERROR PHP DEPRECATED in Plugin 'weathermap': Array and string offset access syntax with curly braces is deprecated in file: /data/htdocs/cacti-1.2.26/plugins/weathermap/setup.php on line: 713
2024-03-11 11:42:34 - CMDPHP PHP ERROR Backtrace: (/clog.php[27]:include(), /include/auth.php[27]:require_once(), /include/global.php[547]:include_once(), /include/global_arrays.php[2926]:api_plugin_hook(), /lib/plugins.php[85]:include_once(), /lib/plugins.php[85]:CactiErrorHandler())
2024-03-11 11:42:34 - ERROR PHP DEPRECATED in Plugin 'weathermap': Array and string offset access syntax with curly braces is deprecated in file: /data/htdocs/cacti-1.2.26/plugins/weathermap/setup.php on line: 713
2024-03-11 11:42:34 - CMDPHP PHP ERROR Backtrace: (/clog.php[27]:include(), /include/auth.php[27]:require_once(), /include/global.php[547]:include_once(), /include/global_arrays.php[2926]:api_plugin_hook(), /lib/plugins.php[85]:include_once(), /lib/plugins.php[85]:CactiErrorHandler())
2024-03-11 11:42:34 - ERROR PHP DEPRECATED in Plugin 'weathermap': Array and string offset access syntax with curly braces is deprecated in file: /data/htdocs/cacti-1.2.26/plugins/weathermap/setup.php on line: 711
2024-03-11 11:42:34 - CMDPHP PHP ERROR Backtrace: (/clog.php[27]:include(), /include/auth.php[27]:require_once(), /include/global.php[547]:include_once(), /include/global_arrays.php[2926]:api_plugin_hook(), /lib/plugins.php[85]:include_once(), /lib/plugins.php[85]:CactiErrorHandler())
2024-03-11 11:42:34 - ERROR PHP DEPRECATED in Plugin 'weathermap': Array and string offset access syntax with curly braces is deprecated in file: /data/htdocs/cacti-1.2.26/plugins/weathermap/setup.php on line: 711
my OS is RedHat Enterprise Linux Server release 7.9 (Maipo)
my cacti is in 1.2.26 version
my weathermap is in 0.98a version.
my php is in PHP 7.4.33 version
Thanks for your time and your help.
Aurelien