| The SD-WAN Rules page fails to load in ADVPN setups, particularly in large environments with numerous spokes. 
The live chart displaying packet loss, latency, or jitter for the selected health check does not appear.
Additionally, the donut charts for Bandwidth, Volume, and Sessions in the SD-WAN Zone view show no data or results.
The following logs are seen in the httpsd debugs and crashlog output. diagnose debug application httpsd -1
diagnose debug enable
13:13:49 [httpsd 1863 - 1730805229 info] fweb_debug_init[531] -- New GET request for "/api/v2/monitor/virtual-wan/health-check" from "10.10.0.10:57489"
13:13:49 [httpsd 1863 - 1730805229 info] fweb_debug_init[533] -- User-Agent: "Mozilla/5.0 (Windows NT 10.0; Win64; x64) AppleWebKit/537.36 (KHTML, likeGecko) Chrome/130.0.0.0 Safari/537.36"
13:13:49 [httpsd 1863 - 1730805229 info] fweb_debug_init[535] -- Handler "api_monitor_v2-handler" assigned to request
13:13:49 [httpsd 1863 - 1730805229 info] api_store_parameter[334] -- add API parameter 'vdom' (type=string)
13:13:49 [httpsd 1863 - 1730805229 info] endpoint_process_req_vdom[1084] -- new API request (action='select',path='virtual-wan',name='health-check',vdom='root',user='test')
13:13:49 2024-11-05 13:13:49 [httpsd 1863 - 1730805229 info] lnkmtd_query_intf_stats[5152] -- lnkmtd query thread started.
13:13:49 [httpsd 1863 - 1730805229 info] emit_linkmon_stats_non_blocking[5071] -- Emitting status of interface: wan
13:13:49 [httpsd 1863 - 1730805229 info] emit_linkmon_stats_non_blocking[5071] -- Emitting status of interface: wan
13:13:49 [httpsd 1863 - 1730805229 info] emit_linkmon_stats_non_blocking[5071] -- Emitting status of interface: wan
13:13:49 [httpsd 1863 - 1730805229 info] emit_linkmon_stats_non_blocking[5071] -- Emitting status of interface: lan1
13:13:49 [httpsd 1863 - 1730805229 info] lnkmtd_query_intf_stats[5210] -- Querying link status of interface: wan
13:13:49 [httpsd 1863 - 1730805229 error] virtualwan_health_check[5359] -- Failed to query interface info.
13:13:49 [httpsd 1863 - 1730805229 error] api_return_http_result[1309] -- API error 500 raised
diagnose debug crashlog read
17:12:41 httpsd [1321] error=-100, method=GET, uri=/api/v2/monitor/virtual-wan/health-ch
17:12:41 eck
17:12:49 httpsd [1320] error=-100, method=GET, uri=/api/v2/monitor/virtual-wan/health-ch
17:12:49 eck
17:12:50 httpsd [1320] error=-100, method=GET, uri=/api/v2/monitor/virtual-wan/health-ch
17:12:50 eck
Crash log interval is 3600 seconds
Max crash log line number: 16384
This issue has been resolved in v7.4.8.
General debug information required by FortiGate TAC for investigation: diagnose debug reset diagnose debug console timestamp enable
diagnose debug application httpsd -1
diagnose debug enable
<reproduce the issue>
diagnose debug reset
diagnose debug disable execute tac report
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