ClosedBit error docs

CB_ERR_DECRYPT_KEY

Decrypt key problem. The decrypt command requires the original matching key and cannot guess or regenerate it.

Why it happens

The decrypt command requires the original matching key and cannot guess or regenerate it.

How to fix it

Use the same key file created during encryption and keep the encrypted package unchanged.

Copy-paste fix pattern
decrypt key_file keys/project.key
If the IDE reports a line number, fix that line first, then scan the previous line for an unclosed string, bracket, or block.