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I've added a lot of RequireJS code, but know suddenly it does not work anymore. I get an error 'Mismatched anonymous define()' for code that's added from phtml files. This is the code where the error is thrown:

the code where the error is thrown

This is the error is thrown:

error

How can this suddenly not work anymore?

Update

I think there's something completely off with my JS loading. I get different JS errors each time I load the page:

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Update 2

Thanks to Siarhey Uchukhlebau I found the answer. The real error was thrown by an external script (Tawk.to, a chat client). This error caused all kind of weird errors. I will investigate this problem further to check if we can isolated these kind of script to prevent them from messing with our main script.

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  • You can find more info about the "Mismatched anonymous define() modules" error in the requireJS docs
    – Siarhey Uchukhlebau
    Commented Jun 2, 2017 at 11:41
  • Hi Siarhey, thanks for your comment. I know about this part in the documentation. The weird thing is it worked for a long time, and now it does not work anymore. I've implemented the requirejs functions as shown in the documentation.
    – Silvan
    Commented Jun 2, 2017 at 11:43
  • Can you share a link to your dev?
    – Siarhey Uchukhlebau
    Commented Jun 2, 2017 at 11:58
  • I can confirm. If you suddenly see alot of JS errors like mentioned here "Mismatched anonymous define()", please check external scripts loading. I had script from cookiebot.com which were responsible for all the errors.
    – puntable
    Commented Apr 15, 2020 at 12:50

3 Answers 3

Reset to default
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As I can see in the debug error comes from the online chat script:

https://embed.tawk.to/58f61af6f7bbaa72709c6ddd/default

debug window

First, try to remove it from your store, clean cache and make sure that error has gone, then I'll recommend you contact their support team.

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  • Siarhey, that's awesome. This solved all of the weird JS errors. I have two questions that you maybe can answer: - How can we debug these errors properly? I see you use the sources tab which I'm known with. But the real error is far away. Is there an easy way to debug this? - Is there a way we can prevent these issues from external scripts? Maybe isolate them or something, to prevent messing with our RequireJS. Thanks again!
    – Silvan
    Commented Jun 2, 2017 at 12:58
  • 1
    @Silvan I just move up on the trace of methods call and come to the source where conditions met (arg[0] is null) , then during inspecting the args I found some info about source class, like specified global variable $_TAWK_. Using google i found script with that variable and found some script on your site: chat widget on your site generates that error. I'll recomend you to start debuging from the line where error was thrown and inspect call-stack trace. PS: Take my apology for my English, i don’t have a good command of it.
    – Siarhey Uchukhlebau
    Commented Jun 2, 2017 at 13:11
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Recently we have faced the require js issue(Mismatched anonymous define()) on the admin side only. This issue was resolved by disabling the Admin Usage Tracking option to NO.

php bin/magento config:set admin/usage/enabled 0;
php bin/magento cache:clean;

First please check this value of admin/usage/enabled path in the core_config_data table and execute the above Magento commands.

I hope these findings will help others and save time.

Source

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  • 1
    Had the very same issue just today, after not changing anything in that project for a couple of days. So I assume other people will also have this problem today. Personally I just disabled the "Magento_AdminAnalytics" extension completely. Its a shame that Magento/Adobe would release such a change possibly impacting a large number of vendors and causing huge financial damage due to time invested for figuring out what the issue is. :-(
    – Louis B.
    Commented Jun 16, 2023 at 10:18
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php bin/magento config:set admin/usage/enabled 0; php bin/magento cache:clean;

@Jitendra Patel, its works for me.

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