please write in english...
and it will be very usefull if you can add more details like the issue template require
without that info it will be hard to answer you

Google translation:

WITH PHP 7.4.1 UNABLE TO DOWNLOAD MEDIA

It can also mean "... upload ...".

Is the issue on J3 or J4?

Just tested J4 and it works for me (admittedly with 7.4.2 rather than 7.4.1). Is anyone here able to do a quick test on j3?

Uploads work fine for me. Tried with Media Manager (including modal) and with TinyMCE drag-n-drop. PHP 7.4.1.

I don't have PHP 7.4 avaliable.

Just tried Joomla 3.9.14, PHP 7.4.2, upload a jpg file using media manager : no problem.
Need more information to test.

Same result with PHP 7.4.0.

If I tell you that I have the same result with PHP 7.4.1, are you surprised ?

@cibler95 if you don't give any more information in the next two days then we'll close this issue down as currently we are unable to reproduce

On Wamperver with Joomla! 4 for different uploads:

• No issue with Content / Media / Upload with PHP 7.4.0 & 7.4.1 & 7.4.2
• No Issue with System / Install / Extension / Upload Package File / Browse for file with PHP 7.4.0 & 7.4.1 & 7.4.2
• Issue with System / Update / Joomla / Upload & Update with PHP 7.4.1 & 7.4.2 (ok on 7.4.0 with another install) before updating file :
  Notice: Trying to access array offset on value of type bool in C:\ ... \administrator\components\com_joomlaupdate\View\Joomlaupdate\HtmlView.php on line 143

@b92 that last item has already been fixed #27653

No I closed it going to pull the version from staging when I merge it through

For info: Last issue found with Joomla_4.0.0-beta1-dev-Development-Update_Package.zip uploaded 2 hours ago !

sorry @wilsonge I missed that part after I had tested it

@cibler95 Closing due to no response. Please post to Joomla Forum for assistance. https://forum.joomla.org/