Kilotest: Diagnoses of attribute value invalid violation by HTML element 1553 on Portland City Club event list page

Basics

About the page

• URL: https://crm.nonprofiteasy.com/6452/Pages/Events/#/
• Tested 3 days ago on 2026-10-07 at 22:13 by job 261007T2147-i1h
• Summary of results:
  • Rule engines:
    • Called: 12
    • Were able to test: 11
    • Reported any rule violations: 10
  • Violations: 7096
  • Violators: 1277
  • Issues: 38
• Download the full technical report (JSON)

About the issue

• Why it matters: Item behaves improperly
• Priority: highest
• Related WCAG standard: 1.3.1
• Reported by 1 rule engine (Html Checker)
• Violations: 4
• Violators: 3

About the violator

• Tag name: IFRAME
• Text: USD … Powered By NonProfitEasy
• Start tag: <iframe name="__privateStripeMetricsController0400" frameborder="0" allowtransparency="true" scrolling="no" role="presentation" allow="payment *" src="https://js.stripe.com/v3/m-outer-3437aaddcdf6922d623e172c2d6f9278.html#url=https%3A%2F%2Fcrm.nonprofiteasy.com%2F6452%2FPages%2FEvents%2F%23%2F&amp;title=Pages&amp;referrer=&amp;muid=NA&amp;sid=NA&amp;version=6&amp;preview=false&amp;__shared_params__[version]=v3" aria-hidden="true" tabindex="-1" style="border-width: medium !important; border-style: none !important; border-color: currentcolor !important; border-image: none !important; margin: 0px !important; padding: 0px !important; width: 1px !important; min-width: 100% !important; overflow: hidden !important; display: block !important; visibility: hidden !important; position: fixed !important; height: 1px !important; pointer-events: none !important; user-select: none !important;">
• XPath: /html/body/iframe[1]
• Bounding box: [not obtained]
• Reported by Html Checker

Diagnoses

Here is how rule engines diagnose the attribute value invalid issue for HTML element 1553 of the Portland City Club event list page.

1. Bad value __privateStripeMetricsController8810 for attribute name on element iframe: Browsing context name started with the underscore.

   Rule engine: Html Checker (World Wide Web Consortium)

2. Bad value for attribute src on element iframe: Illegal character in fragment. [ is not allowed.

   Rule engine: Html Checker (World Wide Web Consortium)