Hello,

There could be many reason for 500 and only server error logs can tell you the real cause.

Please check the server requirements on the documentation.pdf and pay special attention on `MySQL` `only_full_group_by` mode. It should be disabled.

Last, please check the server error logs and let me know the error details so that I can suggest.

Thank you

I got this in logs

<?php defined('BASEPATH') OR exit('No direct script access allowed'); ?>

ERROR - 2020-03-19 10:07:13 --> Severity: Warning --> mysqli::real_connect(): (HY000/1045): Access denied for user 'dbuser'@'localhost' (using password: YES) /www/wwwroot/s.lechiy.com/system/database/drivers/mysqli/mysqli_driver.php 203
ERROR - 2020-03-19 10:07:13 --> Unable to connect to the database
ERROR - 2020-03-19 10:07:13 --> Severity: Warning --> mysqli::real_connect(): (HY000/1045): Access denied for user 'dbuser'@'localhost' (using password: YES) /www/wwwroot/s.lechiy.com/system/database/drivers/mysqli/mysqli_driver.php 203
ERROR - 2020-03-19 10:07:13 --> Severity: Warning --> session_start(): Failed to initialize storage module: user (path: ) /www/wwwroot/s.lechiy.com/system/libraries/Session/Session.php 143
ERROR - 2020-03-19 10:07:13 --> Severity: Warning --> mysqli::real_connect(): (HY000/1045): Access denied for user 'dbuser'@'localhost' (using password: YES) /www/wwwroot/s.lechiy.com/system/database/drivers/mysqli/mysqli_driver.php 203
ERROR - 2020-03-19 10:07:13 --> Unable to connect to the database
ERROR - 2020-03-19 10:07:13 --> Query error: Access denied for user 'dbuser'@'localhost' (using password: YES) - Invalid query: SELECT *
FROM `sma_settings`
ERROR - 2020-03-19 10:07:13 --> Severity: error --> Exception: Call to a member function num_rows() on bool /www/wwwroot/s.lechiy.com/app/models/Site.php 285

Have you installed the item? If yes, this error might be logged before installation. It saying that can't login to database. You can check `app/config/database.php` for db config.

hi sir, of course I did the installation, and everything was fine

Dear, never share your private data publicly. If we request any, you can add private reply (PRIVATE for Staff only).

Please check server error logs. If you have enabled app logs, then you might need to visit few pages to reproduce errors.

sorry for that. I just did re-installation, and got below problem

404 Not Found
nginx

<?php defined('BASEPATH') OR exit('No direct script access allowed'); ?>

ERROR - 2020-03-20 14:24:30 --> Could not find the language line "username"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "password"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "first_name"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "last_name"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "username"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "email"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "phone"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "company"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "gender"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "password"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "confirm_password"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "first_name"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "last_name"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "username"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "email"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "phone"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "company"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "gender"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "product_code"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "product_name"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "cname"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "barcode_symbology"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "product_unit"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "product_price"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "contact_person"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "company"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "email_address"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "address"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "city"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "phone"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "first_name"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "last_name"
ERROR - 2020-03-20 14:24:30 --> Could not find the language line "email"

Nothing in log that could cause error. For 404, please check your site `root` might not be set correctly.

hello sir, sorry I don't know how to check

2020/03/20 13:41:27 [error] 13936#0: *2470 open() "/www/wwwroot/my.lechiy.com/favicon.ico" failed (2: No such file or directory), client: 175.9.88.61, server: my.lechiy.com, request: "GET /favicon.ico HTTP/1.1", host: "my.lechiy.com", referrer: "http://my.lechiy.com/install/"
2020/03/20 13:43:55 [error] 13936#0: *2470 open() "/www/wwwroot/my.lechiy.com/admin" failed (2: No such file or directory), client: 175.9.88.61, server: my.lechiy.com, request: "GET /admin HTTP/1.1", host: "my.lechiy.com", referrer: "http://my.lechiy.com/install/index.php?step=5"
2020/03/20 13:44:03 [error] 13936#0: *2470 open() "/www/wwwroot/my.lechiy.com/admin" failed (2: No such file or directory), client: 175.9.88.61, server: my.lechiy.com, request: "GET /admin HTTP/1.1", host: "my.lechiy.com"
2020/03/20 13:49:28 [error] 14008#0: *2500 open() "/www/wwwroot/my.lechiy.com/admin" failed (2: No such file or directory), client: 175.9.88.61, server: my.lechiy.com, request: "GET /admin HTTP/1.1", host: "my.lechiy.com"
2020/03/20 14:24:30 [error] 14008#0: *2562 open() "/www/wwwroot/my.lechiy.com/admin" failed (2: No such file or directory), client: 175.9.88.61, server: my.lechiy.com, request: "GET /admin HTTP/1.1", host: "my.lechiy.com"
2020/03/20 14:24:32 [error] 14008#0: *2562 open() "/www/wwwroot/my.lechiy.com/admin" failed (2: No such file or directory), client: 175.9.88.61, server: my.lechiy.com, request: "GET /admin HTTP/1.1", host: "my.lechiy.com"
2020/03/20 14:24:33 [error] 14008#0: *2562 open() "/www/wwwroot/my.lechiy.com/admin" failed (2: No such file or directory), client: 175.9.88.61, server: my.lechiy.com, request: "GET /admin HTTP/1.1", host: "my.lechiy.com"
2020/03/20 14:24:33 [error] 14008#0: *2562 open() "/www/wwwroot/my.lechiy.com/admin" failed (2: No such file or directory), client: 175.9.88.61, server: my.lechiy.com, request: "GET /admin HTTP/1.1", host: "my.lechiy.com"
2020/03/20 14:24:33 [error] 14008#0: *2562 open() "/www/wwwroot/my.lechiy.com/admin" failed (2: No such file or directory), client: 175.9.88.61, server: my.lechiy.com, request: "GET /admin HTTP/1.1", host: "my.lechiy.com"
2020/03/20 14:24:59 [error] 14008#0: *2562 open() "/www/wwwroot/my.lechiy.com/admin" failed (2: No such file or directory), client: 175.9.88.61, server: my.lechiy.com, request: "GET /admin HTTP/1.1", host: "my.lechiy.com"
2020/03/20 14:25:00 [error] 14008#0: *2562 open() "/www/wwwroot/my.lechiy.com/admin" failed (2: No such file or directory), client: 175.9.88.61, server: my.lechiy.com, request: "GET /admin HTTP/1.1", host: "my.lechiy.com"
2020/03/20 14:25:00 [error] 14008#0: *2562 open() "/www/wwwroot/my.lechiy.com/admin" failed (2: No such file or directory), client: 175.9.88.61, server: my.lechiy.com, request: "GET /admin HTTP/1.1", host: "my.lechiy.com"
2020/03/20 14:25:00 [error] 14008#0: *2562 open() "/www/wwwroot/my.lechiy.com/admin" failed (2: No such file or directory), client: 175.9.88.61, server: my.lechiy.com, request: "GET /admin HTTP/1.1", host: "my.lechiy.com"
2020/03/20 15:15:07 [error] 14313#0: *2710 open() "/www/wwwroot/my.lechiy.com/admin" failed (2: No such file or directory), client: 175.9.88.61, server: my.lechiy.com, request: "GET /admin HTTP/1.1", host: "my.lechiy.com"
2020/03/20 15:21:14 [error] 14378#0: *2752 open() "/www/wwwroot/my.lechiy.com/admin" failed (2: No such file or directory), client: 175.9.88.61, server: my.lechiy.com, request: "GET /admin HTTP/1.1", host: "my.lechiy.com"