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Hi, Rita Gomes
The “/siteapi” runtime error is being generated by the OneNote Web Clipper website, not by OneNote or a configuration file on your computer. The web.config instructions are intended for the website administrator, so please do not create or modify that file.
Here are some suggestions you can try:
Open an InPrivate or Incognito browser window, install or enable Web Clipper there, and try signing in.
If it works, clear cookies and site data for Microsoft, Office, OneNote, OneDrive, and Microsoft sign-in pages, then fully close and reopen the browser.
Remove the OneNote Web Clipper extension, restart the browser, and reinstall it from the official Edge add-on or Chrome extension.
Note: This information is provided as a convenience to you. Chrome web store is not controlled by Microsoft. Microsoft cannot make any representations regarding the quality, safety, or suitability of any software or information found there. Please make sure that you completely understand the risk before retrieving any suggestions from the above link.
Temporarily disable ad blockers or privacy extensions and test in another supported browser.
If the same “/siteapi” page appears in multiple browsers, this is likely a service-side issue. For now, use the browser’s Share/Send to OneNote option or copy the page manually, and report the error through OneNote > Feedback.
Thank you for your patience in reading, I hope this information has been helpful to you.
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