unabletocopy error

Issue: “unabletocopy” error when saving H5P content in WordPress

Environment

• Platform: WordPress (admin dashboard)

• Plugin: H5P

• Context: Creating or editing an H5P content item

• Editor view: H5P content editor with shortcode panel visible ([h5p id="66"])

Problem Description
When attempting to save or interact with the H5P content editor, an error message appears at the top of the editor screen that reads:

There is no additional error message, stack trace, or explanation provided in the UI.

Observed Behavior

• The error appears inline at the top of the editor.

• The editor itself loads, but the error prevents normal interaction (such as saving or copying content).

• The shortcode panel still renders on the right side, suggesting the H5P item was partially created.

• No browser pop-up, WordPress admin notice, or visible JavaScript error message is shown.

Expected Behavior

• The H5P content should save normally.

• Any copy-to-clipboard or save operation should either complete successfully or provide a descriptive error message.

Likely Meaning of the Error
The message unabletocopy appears to be:

• A raw internal error key rather than a user-friendly message.

• Likely related to a clipboard or copy operation failing (e.g., copying content, parameters, or metadata internally).

• Possibly triggered by:

  • Browser clipboard permission restrictions

  • JavaScript errors not being surfaced properly

  • Plugin localization/translation strings missing

  • A conflict with another plugin or theme

  • WordPress REST API or nonce failure during save

What Has Been Tried / Noted

• Page loads correctly otherwise.

• No visible PHP or WordPress fatal errors.

• Error persists across refresh.

• Occurs inside the H5P editor, not elsewhere in WordPress.

Questions for the Community

1. Has anyone encountered the unabletocopy error in H5P before?

2. Is this a known issue related to clipboard permissions or browser security?

3. Are there specific plugins known to conflict with H5P’s editor?

4. Where can more detailed logs for H5P editor errors be found (JS console vs. server logs)?

5. Is this error tied to a specific H5P content type or recent WordPress update?

Optional extra (if you want better responses)

If posting on GitHub or the H5P forum, also include:

• WordPress version

• H5P plugin version

• Browser + version

• Whether this happens in an incognito window

• Any JavaScript console errors (even if unrelated)

If you want, I can:

• Rewrite this for GitHub Issues format

• Shorten it for WordPress.org plugin forums

• Help you identify what console log to capture so you get faster answers