Hi @valterbruno,
Thanks for reaching out!
Could you please share your website URL where you’re experiencing this issue?
Also, are you referring to this Nirvana theme from Cryout Creations –
https://www.ads-software.com/themes/nirvana/
I tested this theme on my end, and the Table of Contents appears correctly on my end. To help troubleshoot, please go to your WordPress Dashboard > Settings > TOC+ and share a screenshot or a screen recording of all the settings on that page.
You may use a tool like Snipboard (https://snipboard.io/) or Loom (https://www.loom.com/screen-recorder) to create & share the screenshots/screen recordings.
This will help me understand the configuration and identify any possible issues.
I’m really looking forward to helping you.