Error reference · Critical
ERR-001: License signature is invalid
The license key file appears to be corrupt or modified.
What it means
When the plugin verifies the cryptographic signature on your license key against our public key, the math doesn't check out. This is almost always a copy-paste problem — the key got truncated, an extra space slipped in, or only part of the dot-separated string was pasted.
Fix it
- Open the email we sent at purchase.
- Copy the entire license key — it's a long string with two dots in it.
- Make sure you got the full third segment after the second dot (this is the part that gets cut off most often).
- Paste into Image Rotation → License → License key → Activate.
Still broken?
Email support@nereidalabs.com with the last 4 characters of your license key (e.g. "...nbcw") and we'll re-issue.