I expect that somehow this link has been embedded into a content area or property of a page.
To resolve, I think you will need to remove the link from the page content. You should be able to find this by looking in table tblPageSoftlink and getting the ID of the page with the link.
This error occurs when editors copy-paste images directly in tinyMCE.
SQL for locating pages with issues:
SELECT DISTINCT fkPageId FROM tblPageSoftLink
WHERE LinkUrl LIKE '%data:image%'
When we try to use the scheduled job "Link Validation" we get an error message saying
The scheme for the url "data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAATYAAACBCAIAAADFZgGHAAAgAElEQVR4nOy9d3hc1bU+/O5y2vQZ9d5lq1i25F6wMcbYhG4bG4OxLE2f0WhUXDCmmt5JCJCEFEIIAdNCh9BiuiGA6bh3y3JTl0aj0ezvjxkJmZJ7uff7/b58JOtZjx955sycM/usd621VzvAvxQRgAIUIBTggAJoFHpJsgIaoIEooBJhlBJwxJgSc" in not http or https
Any ideas on how to fix or solve this issue?