1-Windows 10
2-Visual Micro 1812.22.0
3-Arduino IDE 1.8.9 2019/02/04

This is my investigation on the app WiFiSpiESP https://github.com/JiriBilek/WiFiSpiESP;
the following message was sent to the author.
***
The Visual Micro requires to have the WiFiManager installed and included;
it verifies the
configModeCallback (line 80)
anyway, not taking into account the presence of the negative directive
#ifdef WIFIMANAGER_ENABLED
...
#endif

With the
WifiManager.h
always included, OK.
It's an issue that concerns the Visual Micro Team.
***

This is the extract of code:
***
//#define WIFIMANAGER_ENABLED
...
#ifdef WIFIMANAGER_ENABLED
Ticker ticker;  // for status LED

void tick()
{
    //toggle state
    int state = digitalRead(LED_BUILTIN);  // get the current state of LED
    digitalWrite(LED_BUILTIN, !state);     // set pin to the opposite state
}

// Gets called when WiFiManager enters configuration mode
void configModeCallback(WiFiManager *myWiFiManager)
{
    //Serial.println("Entered config mode");
    //Serial.println(WiFi.softAPIP());
    //if you used auto generated SSID, print it
    //Serial.println(myWiFiManager->getConfigPortalSSID());
    // entered config mode, make led toggle faster
    ticker.attach(1, tick);
}
#endif
***

amelia

PS: With Arduino IDE directly, all OK.