ok, let me tell you step by step what to do:
1. Go to setting
2. Select discussion
3. Search for “Disallowed Comment Keys”
4. Delete everything at first (save your list somewhere first as backup)
5. Press “Save changes”
6. Clean Cache
7. Try it again
if this works for you, it’s beacuse you have words that it’s blocking “Contact Form 7 Signature Addon ” function, you can clean up everything or you can check word per word and see which one is affecting you!
