Uploading error

[platformio]
default_envs = d1

[env:d1]
platform = espressif8266
board = d1
framework = arduino
lib_deps = me-no-dev/ESPAsyncUDP @ 0.0.0-alpha+sha.697c75a025
Linking .pio\build\d1\firmware.elf
c:/users/alexey masyuk/.platformio/packages/toolchain-xtensa/bin/../lib/gcc/xtensa-lx106-elf/4.8.2/../../../../xtensa-lx106-elf/bin/ld.exe: .pio\build\d1\src\main.cpp.o: in function `setup':
main.cpp:(.text.setup+0x50): multiple definition of `setup'; .pio\build\d1\src\AsyncUDPClient.ino.cpp.o:AsyncUDPClient.ino.cpp:(.text.setup+0x60): first defined here
c:/users/alexey masyuk/.platformio/packages/toolchain-xtensa/bin/../lib/gcc/xtensa-lx106-elf/4.8.2/../../../../xtensa-lx106-elf/bin/ld.exe: .pio\build\d1\src\main.cpp.o: in function `loop':
main.cpp:(.text.loop+0x0): multiple definition of `loop'; .pio\build\d1\src\AsyncUDPClient.ino.cpp.o:AsyncUDPClient.ino.cpp:(.text.loop+0x10): first defined here
collect2.exe: error: ld returned 1 exit status
*** [.pio\build\d1\firmware.elf] Error 1

Help Please, every compilation the same error

It says right there that you have a main.cpp and a AsyncUDPClient.ino in your source folder and both try to define setup() and loop(). Clean the project and remove the file that you don’t want to be compiled.