recive message error

C:\Users\who\Desktop\perl6code>perl6 tg_bot.p6
Unhandled exception in code scheduled on thread 4
Tried to get the result of a broken Promise
in block at D:\rakudo-moar-2021.02.1-01-win-x86_64-msvc\share\perl6\site\sources\DDDD3607B617AC6B7DCA0D086AD3F4247AC394E9 (Cro::TLS) line 108

Original exception:
An operation first awaited:
in block at D:\rakudo-moar-2021.02.1-01-win-x86_64-msvc\share\perl6\site\sources\584A708596C72A1A3A2D0C14E98DC9315145E2FE (IO::Socket::Async::SSL) line 364

Died with the exception:
    Server certificate verification failed: self signed certificate in certificate chain
      in block  at D:\rakudo-moar-2021.02.1-01-win-x86_64-msvc\share\perl6\site\sources\584A708596C72A1A3A2D0C14E98DC9315145E2FE (IO::Socket::Async::SSL) line 364

C:\Users\who\Desktop\perl6code>