Using keyboard.type(key. CapsLock) in Linux causes an error

Using keyboard.type(key. CapsLock) in Linux causes an error

X Error of failed request:  BadValue (integer parameter out of range for operation)
  Major opcode of failed request:  132 (XTEST)
  Minor opcode of failed request:  2 (X_XTestFakeInput)
  Value in failed request:  0x0
  Serial number of failed request:  14
  Current serial number in output stream:  15