error 503

Just enable php 8.0.13 but every time I publish a post my website goes crash 503 with those error log:

2022-01-15 10:19:49.830406 [INFO] [716400] [T0] [135.148.148.230:41092#APVH_www.eugenioruberto.it:443] connection to [uds://tmp/lshttpd/APVH_uaarsn3m_Suphp.sock] on request #0, confirmed, 1, associated process: 2750233, running: 1, error: Connection reset by peer!
2022-01-15 10:19:52.128791 [INFO] [716400] [T0] [51.81.186.219:46018#APVH_www.eugenioruberto.it:443] connection to [uds://tmp/lshttpd/APVH_uaarsn3m_Suphp.sock] on request #0, confirmed, 1, associated process: 2750405, running: 1, error: Connection reset by peer!
2022-01-15 10:19:54.040730 [INFO] [716400] [T0] [51.81.186.219:44406#APVH_www.eugenioruberto.it:443] connection to [uds://tmp/lshttpd/APVH_uaarsn3m_Suphp.sock] on request #0, confirmed, 1, associated process: 2750873, running: 1, error: Connection reset by peer!
2022-01-15 10:19:54.040764 [NOTICE] [716400] [T0] [51.81.186.219:44406#APVH_www.eugenioruberto.it:443] Max retries has been reached, 503!
2022-01-15 10:19:54.040786 [NOTICE] [716400] [T0] [51.81.186.219:44406#APVH_www.eugenioruberto.it:443] oops! 503 Service Unavailable
2022-01-15 10:19:54.040790 [NOTICE] [716400] [T0] [51.81.186.219:44406#APVH_www.eugenioruberto.it:443] Content len: 0, Request line: 'GET /wp-admin/admin-ajax.php?id=&post_id=50356&slug=maria-3&canonical_url=https%3A%2F%2Fwww.eugenioruberto.it%2F2022%2F01%2F15%2Fmaria-3%2F&posts_per_page=5&page=0&offset=0&post_type=post&repeater=default&seo_start_page=1&preloaded=false&preloaded_amount=0&tag=meditazione&order=DESC&orderby=date&post__not_in=50356&action=alm_get_posts&query_type=standard HTTP/1.1'
2022-01-15 10:19:54.040821 [INFO] [716400] [T0] [51.81.186.219:44406#APVH_www.eugenioruberto.it:443] Cookie len: 36, PHPSESSID=ajk46nrkk6b4949uuf6bb63j1v
2022-01-15 10:19:54.041219 [INFO] [716400] [T0] [51.81.186.219:44406#APVH_www.eugenioruberto.it:443] abort request..., code: 4 
2022-01-15 10:20:00.549257 [INFO] [716400] [T0] [109.248.43.212:35468#APVH_www.eugenioruberto.it:443] connection to [uds://tmp/lshttpd/APVH_uaarsn3m_Suphp.sock] on request #0, confirmed, 1, associated process: 2751323, running: 1, error: Connection reset by peer!
2022-01-15 10:20:00.549329 [NOTICE] [716400] [T0] [109.248.43.212:35468#APVH_www.eugenioruberto.it:443] oops! 503 Service Unavailable
2022-01-15 10:20:00.549334 [NOTICE] [716400] [T0] [109.248.43.212:35468#APVH_www.eugenioruberto.it:443] Content len: 0, Request line: 'GET / HTTP/1.1'
2022-01-15 10:20:00.549707 [INFO] [716400] [T0] [109.248.43.212:35468#APVH_www.eugenioruberto.it:443] abort request..., code: 4 
2022-01-15 10:20:03.188514 [INFO] [716400] [T0] [51.81.186.219:46092#APVH_www.eugenioruberto.it:443] connection to [uds://tmp/lshttpd/APVH_uaarsn3m_Suphp.sock] on request #0, confirmed, 1, associated process: 2751673, running: 1, error: Connection reset by peer!
2022-01-15 10:20:09.729910 [INFO] [716400] [T0] [51.81.186.219:45482#APVH_www.eugenioruberto.it:443] Abort request processing by PID:2751937, kill: 1, begin time: 27, sent time: 27, req processed: 0
2022-01-15 10:20:17.533933 [INFO] [716400] [T0] [135.148.148.230:41092#APVH_www.eugenioruberto.it:443] connection to [uds://tmp/lshttpd/APVH_uaarsn3m_Suphp.sock] on request #0, confirmed, 1, associated process: 2752060, running: 1, error: Connection reset by peer!
2022-01-15 10:20:17.533970 [NOTICE] [716400] [T0] [135.148.148.230:41092#APVH_www.eugenioruberto.it:443] Max retries has been reached, 503!
2022-01-15 10:20:17.534008 [NOTICE] [716400] [T0] [135.148.148.230:41092#APVH_www.eugenioruberto.it:443] oops! 503 Service Unavailable
2022-01-15 10:20:17.534011 [NOTICE] [716400] [T0] [135.148.148.230:41092#APVH_www.eugenioruberto.it:443] Content len: 0, Request line: 'GET /2021/01/11/ HTTP/1.1'
2022-01-15 10:20:17.534012 [NOTICE] [716400] [T0] [135.148.148.230:41092#APVH_www.eugenioruberto.it:443] Redirect: #1, URL: /index.php
2022-01-15 10:20:17.534399 [INFO] [716400] [T0] [135.148.148.230:41092#APVH_www.eugenioruberto.it:443] abort request..., code: 4

I ceck, disabled all my plugin, same result.

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