Why mmenu generates "Error: Syntax error, unrecognized expression:" when clicked on a link? - mmenu

I am working to implement mmenu on my site, but every time I click on a link inside the menu, I get the following error in FireBug:
Error: Syntax error, unrecognized expression: [clicked link]
Ideas?

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Website Vitals: Oops! Something went wrong

Hello I am testing my website and I have an score of about 80-90/100 if I look it with Chrome Lighthouse Extension. But in web.dev/measure and https://pagespeed.web.dev
The report returns an error. There is no error in console and there is no indication on what error is. I opened network inspector to see what web.dev was returning and this is what it said:
Lighthouse returned error: NO_FCP. The page did not paint any content. Please ensure you keep the browser window in the foreground during the load and try again. (NO_FCP)
But this is not true, the website loads fast, and works if I check it with the CLI or the Chrome Extension.
Any ideas on how can I debug this to find what is causing this error?
Thanks

Website suddenly stopped loading due to php include?

I was working on my website when suddenly it wouldn't load anymore. After investigating i found out that this no longer worked:
<?php include 'core/init.php'; ?>
But when i changed it to this:
<?php include '/core/init.php'; ?>
Those includes are at the top of my index.php so the page would load nothing. It worked fine, although none of my links no longer worked, it gave me internal 500 error.
Investigating further i got these errors from safari console:
[Error] Failed to load resource: the server responded with a status of 500 (Internal Server Error) (localhost, line 0)
[Error] TypeError: 'undefined' is not a function (evaluating 'this.hide()')
close (content_start_0.js, line 1)
I've been working on my site for the past month using:
<?php include 'core/init.php'; ?>
and never had a problem until a few moments ago.
Any ideas?
The second error is caused by the Firebug Lite extension for Safari.
Go to your inspector, click resources, then expand Extension Scripts. There should be a file there named content_start_0.js.
You can make the error go away if you go into Preferences for Safari, click the Extensions tab, then uncheck "Enable Firebug Lite for Safari."

How can I fix this error in a web template

I just installed a new theme, now I am having a problem. Whenever a customer checks out, the following error is displayed:
Notice: Error: Could not load template
C:\xampp\htdocs\nowahala/catalog/view/theme/default/template/checkout/simplecheckout_shipping.tpl!
in
C:\xampp\htdocs\nowahala\vqmod\vqcache\vq2-system_engine_controller.php
on line 75
How do i fix it?
The simple answer is add the file. The error is pretty simple to understand. The template file is missing from your simple checkout. Open the modification and load the files into there (notice that it is the default folder)

Firefox add-on builder and Jquery Mobile

I am trying everything under my power here to insert jquerymobile.1.0.1 into an extension I have build for firefox.
I can install, link to any other script and everything seems to work just fine, but have had an assortment of errors getting jquerymobile to work.
I've tried uploading through the add-on builder
I've tried remotely linking the file
I've tried copying and pasting the file into other code.. nothing works.
I've coded this extension for safari, chrome and opera without issue, but Firefox chokes the second I link to/include jquerymobile in my code returning this error:
Timestamp: 12-04-27 12:10:33 PM
Error: uncaught exception: [Exception... "Component returned failure code: 0x80004005 (NS_ERROR_FAILURE) [nsIDOMHistory.replaceState]" nsresult: "0x80004005 (NS_ERROR_FAILURE)" location: "JS frame :: resource://jid0-d4zlaxz3cfuahkcdoecsmya637m-at-jetpack/idesireit/data/js/jquery.mobile-1.0.1.min.js :: :: line 72" data: no]
and also an error about "unallowed unicode" which I didn't get the chance to copy or paste, but I haven't seen that one in a few saves...
I've read that the above error can be caused by cross domain functions, but all my cross domain functions are in another js file, and they are all working just fine ( judging by those I can navigate to with jquerymobile acting as it is right now )
I'm a novice - if my error is based on my stupidity, please go lightly :O
I went ahead and created an all new extension,
included nothing but the popup, and in that pop up, called jquery and jquery.mobile.
I got this error instantly again.
I'm just going to go ahead and use the alternative UI I'm using on the dashboard widget, I've wasted too much time on this.
The bug is in the addonsdk, not in JQ Mobile. Any attempt to access or manipulate the window.history object in a panel will raise this error.

Javascript error: "Result of expression 'el' [null] is not an object" while adding any widget to CMS content

In my local dev environment, any time I try to add a widget to a CMS page I get a javascript error: Result of expression 'el' [null] is not an object.
Does anyone know what might cause that?
Magento 1.5.1
Mac OS X 10.6.7
Apache 2.2.17
Safari 5.0.5 / Firefox 3.5.9
In Chrome 12.0.742.100, the error is:
The page at localhost.com says:
Cannot read property 'selectionStart' of null
Has anyone seen this before?
I have got the exact same error on a v1.5.1 CE Magento system when I choose to add via the large orange 'Add Widget' button to a static block or cms page.
However, when I add a widget via the WYSIWYG editor, the widget is added as expected and I do not receive the 'el null' error.
A strange bug that will hopefully be fixed in v1.6.

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