Disabling the HTML Minify option in W3 Total Cache fixes it? Please deactivate the plugin that disables the AMP Optimizer to confirm the issue is fixed at https://www.isliada.org/libros/el-sol-desnudo/amp/
This here is specifically then a bug with W3 Total Cache which they should fix. They’re erroneously removing the trailing slash in the SVG image which must be valid XML. This is the img
in question:
<img alt="" aria-hidden="true" class="i-amphtml-intrinsic-sizer" role="presentation" src="data:image/svg+xml;charset=utf-8,<svg height="75" width="75" xmlns="https://www.w3.org/2000/svg" version="1.1"/>">
That final /
needs to be kept intact.
We’re investigating ways to make the data:
URL more resilient to this kind of thing (e.g. by using base64-encoding), but ultimately the big appears to be the responsibility of W3 Total Cache.