### Godot version

v4.1.1.stable.official [bd6af8e0e]

### System information

Debian 12 i5 650 64 bits

### Issue description

When attempting to type accented characters in text fields or input areas in the Godot Engine, an error is displayed in the console with the message "Caller thread can't call this function in this node (/root). Use call_deferred() or call_thread_group() instead." Additionally, accented characters are not inserted correctly into the text.

**Expected Behavior:**

Accented characters should be inserted correctly into the text field without displaying errors in the console.

**Observed Behavior:**

When attempting to type accented characters, the following error message is displayed in the console:
`Caller thread can't call this function in this node (/root). Use call_deferred() or call_thread_group() instead.`

Accented characters are not inserted correctly into the text.



https://github.com/godotengine/godot/assets/87171245/769c0907-e489-4bf4-84ea-8dd0573ae9de



### Steps to reproduce

Open a project in the specified version of Godot Engine.
Open a text field or input area.
Try to type an accented character, such as "á" or "é."

### Minimal reproduction project

I believe it is not necessary, as it does not involve any interference from the project settings
#include <sys/types.h>
#include <unistd.h>
#undef CursorShape
#include <X11/XKBlib.h>
#define WM_NormalState 1L  window normal state
#define WM_IconicState 3L  window minimized
#define _NET_WM_STATE_REMOVE 0L  remove/unset property
#define _NET_WM_STATE_ADD 1L  add/set property
#define XINPUT_CLIENT_VERSION_MAJOR 2
#define XINPUT_CLIENT_VERSION_MINOR 2
#define VALUATOR_ABSX 0
#define VALUATOR_ABSY 1
#define VALUATOR_PRESSURE 2
#define VALUATOR_TILTX 3
#define VALUATOR_TILTY 4
#ifdef DISPLAY_SERVER_X11_DEBUG_LOGS_ENABLED
#define DEBUG_LOG_X11(...) printf(__VA_ARGS__)
#else
#define DEBUG_LOG_X11(...)
#endif
static const double abs_resolution_mult = 10000.0;
static const double abs_resolution_range_mult = 10.0;
struct Hints {
	unsigned long flags = 0;
	unsigned long functions = 0;
	unsigned long decorations = 0;
	long inputMode = 0;
	unsigned long status = 0;
};
static String get_atom_name(Display *p_disp, Atom p_atom) {