User Struggles with Decoding Key in Cybersecurity Challenge

The user modified the source code to print a local key before it was requested, then used that key to decode encoded text in CyberChef. Despite matching the first four characters of the key with others' methods, the decoded output did not resemble a flag. They received a "Congrats" message but no second flag, and the decoded result for the first flag remained incorrect. The user followed write-ups but still encountered the same issue.