Error occurred while testing the decrypted secret

[MehdiBmm]

While trying to activate trading mode with API key + Secret and passphare, it says:

enter passphrase for secret: 
testing secret...
### Error occurred while testing the decrypted secret:
    'Decrypted secret has wrong size'
    This does not seem to be a valid API secret

secret could not be decrypted
press any key to continue anyways (trading disabled) or 'q' to quit: ^CTraceback (most recent call last):
  File "./pytrader.py", line 1761, in <module>
    main()
  File "./pytrader.py", line 1743, in main
    if secret.prompt_decrypt() != secret.S_FAIL_FATAL:
  File "/home/mehdibmm/Desktop/TradingBot/pytrader/api.py", line 430, in prompt_decrypt
    + "(trading disabled) or 'q' to quit: ")