Please mark your post as having spoiler content next time. Read the error message you get:

Unhandled rejection TestError: [1,'[',']'] same as ['[',']',1]

Description of the cata is false - decision doesn't require Symbol as a key of hash-object.
I'm not satisfied.

It is possible you are misreading the feedback... the log appears above the test result.

this should return false:

84 VdnPvenIKSwomNBPyorSTsxpuRjcTjoftewxEclyiWzvgNEBJFDAPROpewWRAhZhUIkVmjkJiloqzHmPXI84

because there is a number at the end of it!
why the attempt says it should return true?

Suggestion: print out your input, and probably your output as well.

function isAValidMessage(message){
  let res = true
  console.log(`isAValidMessage(${message}) -> ${res}`)
  return res
}

I code in JavaScript. 1 test failed on Attempt. But I don't see which one!!! It bothering!!!