its not generating featured images

Hi
I tried several times but no featured image is generated after clicked the generate featured image button, please could you kindly help me, appreciate it!

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10-09-2021 04:11:05 [pronunciapopular.com][info] START generate in mode: generate
10-09-2021 04:11:05 [pronunciapopular.com][info] Posts query: array (
'has_thumb' => false,
'type' => NULL,
'status' => 'publish',
'category' => 0,
'date_start' => 0,
'date_end' => 0,
)
-------------------------------
10-09-2021 04:50:38 [pronunciapopular.com][info] START generate in mode: generate
10-09-2021 04:50:38 [pronunciapopular.com]infoPosts query: array (
'has_thumb' => false,
'type' => NULL,
'status' => 'publish',
'category' => 0,
'date_start' => 0,
'date_end' => 0,
)
-------------------------------