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Question

Whoops! We seem to have hit a snag. Please try again later.
Codeigniter 4 shows an error when I run the CI4 application, How I resolve?
Changes:
public $baseURL = 'http://ci.local';
public $baseURL = 'http://localhost:8080';
public $indexPage = '';

Answer 1

This work for me try it
Go to app directory then to boot directory you will see production.php file.
That is:
app => Config => Boot => production.php
Change the ini_set('display_errors', '0') to ini_set('display_errors', '1').
Warning: When in production change back to initial ini_set('display_errors', '0')
Or
you can rename your file env in your project directory to .env after that open it and edit.
Search for # CI_ENVIRONMENT = production remove # and change production to development
Warning: When in production change back to initial CI_ENVIRONMENT = development to CI_ENVIRONMENT = production
For those experiencing intl error go to where your php installation directory edit the php.ini file remove semi-colon ";" from ;extension=intl to extension=intl. save the file and restart your server. I think this will solve that error. This particular editing of my php.ini was on php 7.2 - 8.1 so I haven't check other version of php lesser than these versions which Codeigniter 4 does not support

Answer 2

After installing CodeIgniter 4 when you run the app then you will get an error like this
To know the error go to the app/Config/Boot/production.php and set display_errors to 1 as below
ini_set('display_errors', '1');
Now, you will see the actual error below
Nothing to worry about it. The app needs permission. Assign the permission like as below
sudo chmod -R 777 project_name

Answer 3

Assume that your root folder of your CI4 project is rootproject.
Edit rootproject/.env file.
On line 17 change from:
# CI_ENVIRONMENT = production
to:
CI_ENVIRONMENT = development
Save it.
Refresh your browser that pointing to your CI4 project.
It should give you many error messages.
If there is something written as CacheException, than your cache folders are not writable.
Make it writable;
Ubuntu:
chown -Rv www-data rootproject/writable
CentOS:
chown -Rv apache rootproject/writable
Easy way:
chmod 777 -Rv rootproject/writable

Answer 4

In your CI4 project root, create a file named .env. It should be in the same directory as system, app e.t.c
Then, add this CI_ENVIRONMENT = development

Answer 5

The problem is most likely due to missing extensions. Check server requirements here.. Check your php.ini file and make sure intl and mbstring are enabled.

Answer 6

I had the same problem, I have a simple solution for Mac.
- in the project folder, go to 'writable'
- select all the folders contained and click on 'get information'
- go share and permissions
- in 'everyone' select 'read and write'
That's it! refresh the page

Answer 7

Try This
Open [xampp]/php/php.ini
Search for ;extension=intl and remove the ;
Save the php.ini file and restart Apache(server).

Answer 8

In Root folder change: env to .env
Change # CI_ENVIRONMENT = production to CI_ENVIRONMENT = development (ensure it is uncommented)
Your error may be related to the knit.php file.
Go to System/Third Party and change: knit.php to Knit.php (Capital)
Reload.

Answer 9

For those using XAMPP in MacOS:
You don't need to change the ownership of the writable directory. You only need to change permission to entire directory:
chmod -R 777 writable

Answer 10

When you change # CI_ENVIRONMENT = production to CI_ENVIRONMENT = development don't forget of rename the env file to .env else it will not work.

Answer 11

You're running in the production environment and need to change it to a Development or Testing environment to see the error messages within the browser.
There are a few ways to do this, but adding:
SetEnv CI_ENVIRONMENT development
To the Apache httpd.config file is what worked for me.
_t

Answer 12

I got the answer for this query; just follow these steps:
From the command line, at your project root just hit this
php spark serve
Then hit this on your browser http://localhost:8080/
Enjoy your Latest CI.

Answer 13

Not sure what the desired answer is, but:
If you are asking to see what is the actual error is - either change
your environment to testing/development (as suggested so far) or you
can check your logs - writable/logs/log-.php
If you wish to solve the error, we will need more information, like have
you setup virtual hosts, have you change .htaccess file in public
folder, etc. Otherwise we will be most likely betting (I bet it's virtual hosts).
In any case, a copy of the displayed error (after changing evnironment) or log file will be useful.

Answer 14

You can check logs file on writable/logs find error information,
If your logs information like :
CRITICAL - 2020-04-19 17:44:55 --> Invalid file: template/header.php
#0 F:\xampp\htdocs\ppdb\vendor\codeigniter4\framework\system\View\View.php(224): CodeIgniter\Exceptions\FrameworkException::forInvalidFile('template/header...')
And go fix your error, in my case i am wrong typed name on controller file

Answer 15

In Codeigniter 4 source code have a folder named writable, just update it's access permission. Sometimes it'll help to get rid of Whoops. Also can check the video for Ubuntu / Linux