🧩 Why This Error Happens
Each project you create in Website Studio generates its own unique OTTO pixel script. This script contains a UUID (Unique User Identifier) that is specific to that project alone. If you copy the pixel script from one Website Studio project and paste it into a different project, OTTO will detect a UUID mismatch and the scan will fail.
This is the most common cause of the wrong UUID error: the pixel installed on your site belongs to a different Website Studio project, not the one you are currently trying to activate.
✅ How to Get the Correct Pixel Script
Follow these steps carefully for each Website Studio project you want to connect to OTTO.
- In the left sidebar, click OTTO SEO.
- Click All Sites to see your list of sites.
- Locate the site that corresponds to the Website Studio project you are working on and open it.
- In the left sidebar under OTTO SEO, click Installation Guide.
- Copy the pixel script shown on that page. This script contains the UUID that is uniquely tied to this specific project.
- Go to your Website Studio project in the left sidebar under Website Studio and open the correct project.
- Paste the pixel script into the header or footer code injection area of that project — do not use a script copied from any other project.
- Save your changes and publish the site.
- Return to OTTO SEO → Overview and click Scan to verify the pixel is detected correctly.
⚠️ Key Rules to Avoid UUID Errors
- Never share pixel scripts between projects. Each Website Studio project must use only its own unique pixel script.
- Always retrieve the script from the Installation Guide of the specific OTTO site that matches your Website Studio project.
- If you have multiple Website Studio projects, repeat the steps above individually for each one — do not duplicate or reuse scripts.
- After republishing a project, always run a fresh Scan from OTTO SEO → Overview to confirm the pixel is recognised.
🔍 How to Check Which UUID Is Currently Installed
If you are unsure whether the correct script is installed, you can verify it quickly:
- Open the live URL of your Website Studio project in a browser.
- Right-click anywhere on the page and select View Page Source.
- Use Ctrl + F (or Cmd + F on Mac) to search for uuid.
- Copy the UUID value you find and compare it to the UUID visible in OTTO SEO → Installation Guide for that project.
- If the values do not match, remove the existing script and replace it with the correct one from the Installation Guide.
🗂️ Managing Multiple Website Studio Projects
If you manage several Website Studio projects under the same account, use this checklist to stay organised:
- Label each project clearly inside Website Studio so you can easily match it to the correct OTTO site.
- Before installing any pixel, navigate to the OTTO site for that specific project and retrieve its Installation Guide script fresh — never copy from a previously saved file or another project.
- After installing on each project, run a Scan individually per site to confirm successful detection before moving to the next.
💬 Still Seeing the Wrong UUID Error?
If you have followed all the steps above and the wrong UUID error persists, it is possible the page cache is serving an older version of the site. Try clearing your Website Studio project's cache and republishing, then run the scan again.
If you need further assistance, open the chat widget in the bottom-right corner of the platform and type human teammate to be connected with a member of our team.