Joomla-cms: Joomla! 3.4.5 : Uncaught TypeError: Cannot read property 'task' of null at Core.js 1

[TOuhrouche]

I am having tons of issues creating any new item (articles, menu items...) after I upgraded my joomla installation to 3.4.5.
For example, when I try to create a menu item or a new article, I get Uncaught TypeError: Cannot read property 'task' of null. After doing some research, it turns out the issue is coming from this form not having an id named adminForm:
<form action="..." method="post" name="adminForm" id="item-form" class="form-validate"> ... </form>
Anyone got a clue of what can this be and how to fix it?

[ggppdk]

Your browser may be using old JS / Files
In pages that you have JS error did you force latest JS / CSS to be downloaded ?
PC: CTRL-F5
Safari: CMD + R
Linux: F5

[TOuhrouche]

Yes I did try a force reload of all my resources using the Chrome dev tools. I also tried purging expired files on Joomla but did not help.

[brianteeman]

Can you please confirm if you are still having this issue now that you have updated to 3.4.7 - I suspect that your upgrade to 3.4.5 may not have been successful or that you are having asset cache issues as we have seen no other reports of this

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_{This comment was created with the J!Tracker Application at issues.joomla.org/joomla-cms/8677.}

[TOuhrouche]

I tried everything I could to make it work but the problem persisted. I even uninstalled Joomla and reinstalled it over again, no luck. The issue seemed to be coming from data saved with the previous Joomla site. At last, I had to just delete all my database content and create everything from scratch :(

[izharaazmi]

@TOuhrouche Changing following should fix it, as you correctly discovered. But I wonder why it so happened in core in the first place; and that on Joomla update!

<form action="..." method="post" name="adminForm" id="item-form" class="form-validate"> 

to

<form action="..." method="post" name="adminForm" id="adminForm" class="form-validate"> 

Can you tell us which file(s) this code excerpt is from? Your old Joomla version before this update?

[brianteeman]

As the reporter has now resolved their issue I am closing this

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_{This comment was created with the J!Tracker Application at issues.joomla.org/joomla-cms/8677.}

[zealinfovision]

@Thank you so much.
Its working fine for me. You saved me lot of time.