Error: Call to undefined function Nette\Http\imagetypes() about http HOT 5 CLOSED

It's not very obvious from the error, but you probably don't have PHP extension GD installed. That's why call of method FileUpload->isImage() is failing.

from http.

sudo apt install php-gd
Reading package lists... Done
Building dependency tree
Reading state information... Done
php-gd is already the newest version (2:7.4+75).

from http.

Other reasons why may be imagetypes missing is that GD extension is not loaded (check with var_dump(get_loaded_extensions());) or function is disabled (check with echo ini_get('disable_functions');)
Check via both http request and cli, they have separate .ini configs.

from http.

With this composer configuration "nette/http": "^3.1 < 3.2.3", the framework work correctly

from http.

With this composer configuration "nette/http": "^3.1".
Server restarted, problem solved!!! Thank's for your support!!!

from http.