Cannot understand reasons of next errors:

[SergeZon]

In file included from D:\Arduino_Projects\RGT_BT_steering\RGT_BT_steering.ino:22:
d:\Users\Serge\Documents\Arduino\libraries\ESP32_BLE_Keyboard/BleKeyboard.h:131:60: error: expected class-name before ',' token
131 | class BleKeyboard : public Print, public BLEServerCallbacks, public BLECharacteristicCallbacks
| ^
d:\Users\Serge\Documents\Arduino\libraries\ESP32_BLE_Keyboard/BleKeyboard.h:19:36: error: 'NimBLEAdvertising' does not name a type; did you mean 'BLEAdvertising'?
19 | #define BLEAdvertising NimBLEAdvertising
| ^~~~~~~~~~~~~~~~~
d:\Users\Serge\Documents\Arduino\libraries\ESP32_BLE_Keyboard/BleKeyboard.h:138:3: note: in expansion of macro 'BLEAdvertising'
138 | BLEAdvertising* advertising;
| ^~~~~~~~~~~~~~
d:\Users\Serge\Documents\Arduino\libraries\ESP32_BLE_Keyboard/BleKeyboard.h:176:16: error: 'virtual void BleKeyboard::onConnect(NimBLEServer*)' marked 'override', but does not override
176 | virtual void onConnect(BLEServer* pServer) override;
| ^~~~~~~~~
d:\Users\Serge\Documents\Arduino\libraries\ESP32_BLE_Keyboard/BleKeyboard.h:177:16: error: 'virtual void BleKeyboard::onDisconnect(NimBLEServer*)' marked 'override', but does not override
177 | virtual void onDisconnect(BLEServer* pServer) override;
| ^~~~~~~~~~~~
d:\Users\Serge\Documents\Arduino\libraries\ESP32_BLE_Keyboard/BleKeyboard.h:178:16: error: 'virtual void BleKeyboard::onWrite(NimBLECharacteristic*)' marked 'override', but does not override
178 | virtual void onWrite(BLECharacteristic* me) override;
| ^~~~~~~

[StevT7]

The NimBLE library's API has been updated, necessitating several modifications to both the .h and .cpp files to align with the new interface.

[StevT7]

BleKeyboard.h:

Include additional libraries

IS:

#include "NimBLECharacteristic.h"
#include "NimBLEHIDDevice.h"

NEW:

#include "NimBLECharacteristic.h"
#include "NimBLEHIDDevice.h"
#include "NimBLEAdvertising.h"
#include "NimBLEServer.h"

Change the following lines

IS:

virtual void onConnect(BLEServer* pServer) override;
virtual void onDisconnect(BLEServer* pServer) override;
virtual void onWrite(BLECharacteristic* me) override;

NEW:

virtual void onConnect(BLEServer* pServer, NimBLEConnInfo & connInfo) override;
virtual void onDisconnect(BLEServer* pServer, NimBLEConnInfo & connInfo, int reason) override;
virtual void onWrite(BLECharacteristic* me, NimBLEConnInfo & connInfo) override;

[byerss]

I've temporality worked around the issue by using the old version of NimBLE in PlatformIO like so:

lib_deps = 
    T-vk/ESP32 BLE Keyboard@^0.3.2-beta
    NimBLE-Arduino@^1.4.3
build_flags = 
    -D USE_NIMBLE