Failed to build for ESP8266

[kinkate]

I tried to build and install it on a ESP8266 Wemos D1 mini. If I choose the default enviroment i get the "wrong chip"- failure-message. If I choose the nodemcuv2-enviroment as recomendet I always get the error "SoftwareSerial.h: no such file or directory.

If I coment it out in main.cpp and comm.h, I get other errors like "'class WiFiClient' has no member named 'getTimeout'"

What I'm doing wrong? Any ideas?
TIA.
Olaf
Update: After a few queries in different discussions I reinstalled Visual-Code and PlatformIO. This solved my problem!