VC2084: data-anchor-parameter is deprecated
data-anchor-parameter binds a link without declaring it, so it can't be edited in Block Properties.
How to fix
Declare <parameter name="x" type="anchor"> and use href="@block.x.href", target="@block.x.target", data-link-id="@block.x.link-id" and @block.x.text. The fix does this.