I got the same message from my 2 active sites, both version 9.3.1.
Log details:
Error
The scan failed to properly scan the site.
Error Message: Not Found
Error Code: not_found
If you contact support about this error, please provide the following debug details:
Array
code => not_found
data => Array
url => https://xxx.xx
Raw log:
id => 7101
module => site-scanner
type => warning
code => scan-failure-client-error
timestamp => 2024-02-27 20:14:57
init_timestamp => 2024-02-27 20:14:56
remote_ip => 123.123.123.123
user_id => [empty string]
url => wp-cron
memory_current => 31707232
memory_peak => 34223448
data => Array
results => Object WP_Error
errors => Array
not_found => Array
0 => Not Found
error_data => Array
not_found => Array
url => https://xxx.xx
cached => [boolean] false