TYPO3 8.7.1 backend Login not working

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I have a plain naked TYPO3 8 lts installation.

But I cant login with the backend user.

Install Tool works fine When I create a new BE user in install tool it does not work as well ...

any ideas?

4 Answers

For me the solution was deleting the cookies from the browser, then login form works good.

I ran to a problem where I couldn't login to backend, even if I had [BE][loginSecurityLevel] set to normal. Nether did it work on a unix system or windows. The reason I found out was, because the extension 'sv' was disabled (not in PackageStates.php array).

So I went to PackageStates.php and added following to the array:

    'sv' => [
        'packagePath' => 'typo3/sysext/sv/',
    ],

Before that happened, I downgraded TYPO3 from 9 to 8. I was able to log in first, but not the next day, after the first logout. This extension contains core default services.

Use the Debugger for your browser, e.g. Firefox Developer, and check if an error is given there.

Loading failed for the <script> with source “http://www.my-typo3-website.de/typo3/sysext/core/Resources/Public/JavaScript/Contrib/jquery/jquery-3.2.1.js”.

If you copy and past the above url into a web browser, you will see this outpu:

The requested URL /typo3/sysext/core/Resources/Public/JavaScript/Contrib/jquery/jquery-3.js was not found on this server.

The file name jquery-3.2.1.js has been abbreviated into jquery-3.js!

It can happen that the jquery used by the login form is not included as needed. This can happend by a Rewrite rule in the .htaccess file which transforms the filename jquery-3.2.1.js into a smaller name jquery-3.js which will not be found, because it simply does not exist on the file system. At least you should try out the original .htaccess file named "_.htaccess" which is shipped with TYPO3.

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