Moodle in English: Moodle YUI not defined, no JS no CSS

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Moodle YUI not defined, no JS no CSS

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Moodle YUI not defined, no JS no CSS

by travis wilder - Friday, December 11, 2015, 3:30 AM

This topic has been brought up many times over the internet and no solution has worked for me, thus I'm here posting now.

So I have a hand full of issues with my Moodle, non of which I can figure out. First I want to point out I am a software developer, I specialize in front and back end development. I'm stating this in an attempt to convey that I'm not an idiot, I am knowledgeable with servers and programming.

I am using Moodle version 2.6.6 Build 20141110.

In an overall my theme does not load. Css and JS files are not loading, I get a lot of : "net::ERR_CONTENT_DECODING_FAILED" in my Google Chrome console. I also get anywhere between 1-3 "YUI is not defined" errors depending on the page I am on.

So this is what I've tried/found out:

*With `themedesignermode` DISABLED my css is completely broken. Website has no styling and is hard to navigate

*With `themedesignermode` ENABLED I have css, the website *appears* to be good to go however most JS fails to load.

-I pretty much can't navegate anywhere because moodle uses js to load all the a hrefs. However I can go into my

browser and disable JS and then I'm able to navigate the site because the a hrefs populate via the html. This is

where I am at and how I'm able to access the admin panels. Otherwise I can't even log into my site.

*I've tried enabling/disabling `cachejs`

*I've tried enabling/disabling `useexternalyui`

*I've tried enabling/disabling `yuicomboloading`

*I've tried enabling/disabling `slasharguments`

*I've tried enabling/disabling `enabledevicedetection`

*I've tried enabling/disabling `enableajax`

*I am using theme clean, but I have tried standard as well as afterburner.

*I've checked my httpd (apache) logs and nothing is useful inside there.

*I have deleted my moodle data so that way moodle rebuilds it in an attempt to see if it's my moodle data is corrupt, no luck.

I have spent over 6 hours trying every single possible combination of settings listed above trying to find a perfect match, all coming up short. I purge all caches and theme caches between every test.

Now this is where things get even better. I am on a local network running a virtual box that is running centos 6.6.

We use github to centralize all our code. The moodle files I have, 3 other developers also have. Those 3 other developers do NOT have the same problem I have. In an attempt to confirm I don't have corrupt files I had one of the developers zip up all of their moodle files and I replaced my files with their files. Still no change what so ever. (works for them, doesn't work for me)

The database populating moodle is ran on a centralized server. So all the developers are using the same database (therefore it can't be a database problem).

The only other variable is the server running apache because each one of us developers are running our own instance of a virtual machine. HOWEVER we are all running the same clone of our virtual box so that takes away that variable.

My files, database, moodledata, and virtual machine all match the other 3 developers however my css/js doesn't load whereas everyone else's does, explain that one?

The company I work for has about 8 sites that use moodle, of those 8 there are about 3 that behave like this (for just me). The code when pushed to production works just fine as well as works just fine for the other 3 developer's local boxes. The problem relies on something I have that they don't, but I don't know what that is.

Any suggestions?

Here is a sample output of my console in chrome:

Failed to load resource: net::ERR_CONTENT_DECODING_FAILED

http://192.168.1.45/CONFIDENTIAL/moodle/theme/yui_combo.php?rollup/3.13.0/yui-moodlesimple.css Failed to load resource: net::ERR_CONTENT_DECODING_FAILED

http://192.168.1.45/CONFIDENTIAL/moodle/theme/yui_combo.php?rollup/3.13.0/yui-moodlesimple.js Failed to load resource: net::ERR_CONTENT_DECODING_FAILED

javascript.php?rev=-1&jsfile=%2Flib%2Fjavascript-static.js:791 Uncaught ReferenceError: YUI is not defined

javascript.php?theme=clean&rev=-1&type=footer:3 Uncaught ReferenceError: YUI is not defined

192.168.1.45/:194 Uncaught ReferenceError: YUI is not defined

Re: Moodle YUI not defined, no JS no CSS

by travis wilder - Friday, December 11, 2015, 4:05 AM

I finally have made *some* success.

I went into my php.ini and enabled `zlib.output_compression`

This appears to have solved all the js and css however now when I click `Site administration` for example I get the following error:

Coding error detected, it must be fixed by a programmer: Unexpected output whilst processing AJAX request. This could be caused by trailing whitespace. Output received: ' '

* line 105 of /lib/ajax/ajaxlib.php: coding_exception thrown
* line 54 of /lib/ajax/getsiteadminbranch.php: call to ajax_check_captured_output()

I am now debugging this error as it is new.

Average of ratings: -

Re: Moodle YUI not defined, no JS no CSS

by Omar Ramon - Tuesday, September 6, 2016, 10:35 PM

Same issue here. File config.php was edited and saved from Windows. Apparently the text editor saved it as UTF-8 with BOM. The BOM (some bytes at the beginning of the file) obviously affected all Moodle output. Text content still displays but binary content like images, icons, attachments, etc. failed because the extra bytes. Deactivation of zlib compression solved it partially because text files where sent uncompressed (with the BOM) but with zlib compression, the browser cannot open them. Simply deleting the BOM from config.php solved the problem.

Average of ratings:Useful (1)

Re: Moodle YUI not defined, no JS no CSS

by Bishwanath Jha - Friday, May 12, 2017, 6:35 PM

@ravis wilder Today i installed the latest moodle 3.2 on Linux Ubuntu server with Apache2 and PHP5.6. After successful installation, on the final screen no css or js was loading. pretty much similar to your issue. Getting `ERR_CONTENT_DECODING_FAILED` when url "/theme/yui_combo.php?rollup/3.17.2/yui-moodlesimple-min.css" was hit.

I did some googling and found that its related to zlib compression and after enabling it in my php.ini file the problem is solved.

-- Go to php.ini file "sudo vi /etc/php/5.6/apache2/php.ini "

-- Add or set below 2 lines

zlib.output_compression = on

zlib.output_compression_level = 6

-- Restart apache

sudo service apache2 restart

It will start working fine.

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