Internal Server Error, web server not found

I am having issues with my ERPnext software. I have installed it on Ubuntu 18.04 LTS as a virtual box image on another Ubuntu 18.04 LTS.

Sometimes after prolonged usage, the webpage shows internal server error and on refreshing i get my firewall screen saying address not found
However, The software is still accessible over the internet. I just cant access it over LAN. I have to wait 10-15 minutes everytime.

Any suggestions?

17%20AM_LI

update: im getting the following error in my firewall

SERVER-WEBAPP WordPress Google Maps Plugin CVE-2019-10692 SQL Injection

no idea how to fix this

Update:

heres my error log file

im getting a buffer warning everytime i encounter this issue

2020/06/17 16:17:51 [warn] 821#821: *325904 a client request body is buffered to a temporary file /var/lib/nginx/body/0000000292, client: 192.168.0.200, server: localhost, request: “POST /api/method/frappe.desk.form.save.savedocs HTTP/1.1”, host: “192.168.0.251”, referrer: “http://192.168.0.251/desk
2020/06/17 16:18:06 [warn] 821#821: *326213 a client request body is buffered to a temporary file /var/lib/nginx/body/0000000293, client: 192.168.0.200, server: localhost, request: “POST /api/method/frappe.desk.form.save.savedocs HTTP/1.1”, host: “192.168.0.251”, referrer: “http://192.168.0.251/desk
2020/06/17 16:19:49 [warn] 821#821: *328266 a client request body is buffered to a temporary file /var/lib/nginx/body/0000000294, client: 192.168.0.200, server: localhost, request: “POST /api/method/frappe.desk.form.save.savedocs HTTP/1.1”, host: “192.168.0.251”, referrer: “http://192.168.0.251/desk
2020/06/17 16:20:21 [warn] 821#821: *329005 a client request body is buffered to a temporary file /var/lib/nginx/body/0000000295, client: 192.168.0.200, server: localhost, request: “POST /api/method/frappe.desk.form.save.savedocs HTTP/1.1”, host: “192.168.0.251”, referrer: “http://192.168.0.251/desk
2020/06/17 16:20:32 [warn] 821#821: *329436 a client request body is buffered to a temporary file /var/lib/nginx/body/0000000296, client: 192.168.0.200, server: localhost, request: “POST /api/method/frappe.desk.form.save.savedocs HTTP/1.1”, host: “192.168.0.251”, referrer: “http://192.168.0.251/desk
2020/06/17 16:24:14 [error] 821#821: *330683 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 192.168.0.251, server: localhost, request: “GET /api/method/frappe.realtime.get_user_info?sid=aa4f7e637b0462632212813d3020b20e8b5b72113104e8e8769c66a8 HTTP/1.1”, upstream: “http://127.0.0.1:8000/api/method/frappe.realtime.get_user_info?sid=aa4f7e637b0462632212813d3020b20e8b5b72113104e8e8769c66a8”, host: “192.168.0.251”
2020/06/17 16:24:14 [error] 821#821: *330685 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 192.168.0.251, server: localhost, request: “GET /api/method/frappe.realtime.get_user_info?sid=aa4f7e637b0462632212813d3020b20e8b5b72113104e8e8769c66a8 HTTP/1.1”, upstream: “http://127.0.0.1:8000/api/method/frappe.realtime.get_user_info?sid=aa4f7e637b0462632212813d3020b20e8b5b72113104e8e8769c66a8”, host: “192.168.0.251”
2020/06/17 16:25:07 [error] 821#821: *330710 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 192.168.0.200, server: localhost, request: “GET /desk HTTP/1.1”, upstream: “http://127.0.0.1:8000/desk”, host: “192.168.0.251”
2020/06/17 16:25:08 [error] 821#821: *330714 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 192.168.0.251, server: localhost, request: “GET /api/method/frappe.realtime.get_user_info?sid=8f77e4bc65cfa360547d134c7917e597e325dc33e7769478eea2626d HTTP/1.1”, upstream: “http://127.0.0.1:8000/api/method/frappe.realtime.get_user_info?sid=8f77e4bc65cfa360547d134c7917e597e325dc33e7769478eea2626d”, host: “192.168.0.251”
2020/06/17 16:26:05 [error] 821#821: *330736 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 192.168.0.200, server: localhost, request: “GET / HTTP/1.1”, upstream: “http://127.0.0.1:8000/”, host: “192.168.0.251”
2020/06/17 16:27:00 [error] 821#821: *330746 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 192.168.0.100, server: localhost, request: “GET /favicon.ico HTTP/1.1”, upstream: “http://127.0.0.1:8000/favicon.ico”, host: “192.168.0.251”
2020/06/17 16:27:17 [error] 821#821: *330755 upstream timed out (110: Connection timed out) while reading response header from upstream, client: 192.168.0.100, server: localhost, request: “GET / HTTP/1.1”, upstream: “http://127.0.0.1:8000/”, host: “192.168.0.251”
2020/06/17 16:30:14 [warn] 821#821: *330907 a client request body is buffered to a temporary file /var/lib/nginx/body/0000000297, client: 192.168.0.200, server: localhost, request: “POST /api/method/frappe.desk.form.save.savedocs HTTP/1.1”, host: “192.168.0.251”, referrer: “http://192.168.0.251/desk
2020/06/17 16:30:39 [warn] 821#821: *330962 a client request body is buffered to a temporary file /var/lib/nginx/body/0000000298, client: 192.168.0.200, server: localhost, request: “POST /api/method/frappe.desk.form.save.savedocs HTTP/1.1”, host: “192.168.0.251”, referrer: “http://192.168.0.251/desk
2020/06/17 16:31:01 [warn] 821#821: *331018 a client request body is buffered to a temporary file /var/lib/nginx/body/0000000299, client: 192.168.0.200, server: localhost, request: “POST /api/method/frappe.desk.form.save.savedocs HTTP/1.1”, host: “192.168.0.251”, referrer: “http://192.168.0.251/desk
2020/06/17 16:31:20 [warn] 821#821: *331074 a client request body is buffered to a temporary file /var/lib/nginx/body/0000000300, client: 192.168.0.200, server: localhost, request: “POST /api/method/frappe.desk.form.save.savedocs HTTP/1.1”, host: “192.168.0.251”, referrer: “http://192.168.0.251/desk

Hi @Sagun_Sood

Did you find a way around this ?

Kind regards