I have the same problem. That’s what I am getting in your rsd link:
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XML-Verarbeitungsfehler: XML- oder Text-Deklaration nicht am Beginn der Entit?t
Adresse: https://ruckh.org/blog/xmlrpc.php?rsd
Zeile Nr. 3, Spalte 1:<?xml version=”1.0″ encoding=”UTF-8″?><rsd version=”1.0″ xmlns=”https://archipelago.phrasewise.com/rsd”>
^
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I am not a developer, but switched off all plugins to check if it was still there and it was. I use the journalist plugin from https://lucianmarin.com/page/themes
How could I find what actually causes the problem? And even worse: fix them once I’ve found them?
