| URL is rejected | Invalid scheme, malformed address or blocked private target | Use a valid public HTTP or HTTPS URL and remove internal addresses. |
| Screenshot shows a login page | The destination requires an authenticated session | Capture locally with authorized access; the public renderer cannot sign in. |
| CAPTCHA appears | The site challenges automated visitors | Use a permitted public page or contact the site; do not bypass its restrictions. |
| Capture times out | Slow server, scripts or renderer timeout | Try a lighter public page, increase allowable delay or retry later. |
| Images appear blank | Images are lazy-loaded or blocked | Try full-page mode and increase loading delay within supported controls. |
| Fonts are wrong | Web fonts failed to load before the capture | Allow more loading time and verify font requests on the source website. |
| Dark theme is ignored | The active renderer or destination does not honor the preference | Use the website’s default theme or a supported self-hosted engine for controlled tests. |
| Capture differs from my browser | Cookies, location, experiments or user-agent differ | Compare anonymous browser conditions and matching viewport settings. |
| Sticky header repeats | Long-page scrolling and fixed elements can interact | Use viewport captures or smaller sections for the affected page. |
| Entire page is too tall | Long pages and infinite feeds can generate oversized output | Capture key sections with viewport mode and document the scope. |
| PDF looks blurry | The source image resolution is insufficient | Use 2x scale and inspect PDF at intended display size. |
| JPG text has artifacts | Lossy encoding removes fine visual details | Choose PNG for text-heavy pages and UI review. |
| WebP cannot open | The destination software lacks WebP support | Export PNG or JPG instead. |
| Phone layout appears broken | The site may have responsive bugs or a viewport mismatch | Verify at another mobile width and reproduce in a real browser. |
| Custom viewport is rejected | Input dimensions are outside the allowed range | Set supported dimensions and retry. |
| Bulk run partially fails | Some URLs are inaccessible, throttled or malformed | Review failed rows, clean URLs and retry individually. |
| ZIP appears incomplete | Some captures failed or files were not returned | Compare archive files with bulk success counts and retry failures. |
| Metadata is missing | The target omitted tags or blocked metadata retrieval | Check source HTML and metadata separately. |
| Technology detection looks incorrect | Fingerprinting relies on imperfect signals | Confirm frameworks and software with first-party technical evidence. |
| Clipboard copy fails | Browser permissions or context restrict clipboard access | Download the image and attach it manually. |
| Private network URL is blocked | SSRF protection rejects localhost and private ranges | Use an authorized local capture workflow. |
| SSL certificate error | The target presents an invalid or unsupported certificate | Correct the site certificate and reload through HTTPS. |
| Old content remains in screenshot | Page or renderer caching, or dynamic update delay | Reload the source and rerun with adequate loading delay. |
| Screenshot contains personal data | The public page itself displays information or parameters | Redact sensitive content before publishing and use only authorized material. |
| API returns rate-limit error | Request volume exceeds permitted rate | Reduce concurrency and honor published rate limits. |
| Scheduled capture control is missing | Automated monitoring is not yet a generally available feature | Use manual capture or documented APIs within their usage policies. |