diff --git a/src/core/ksslerror_p.h b/src/core/ksslerror_p.h
--- a/src/core/ksslerror_p.h
+++ b/src/core/ksslerror_p.h
@@ -27,7 +27,7 @@
 class KSslErrorPrivate
 {
 public:
-    static KSslError::Error errorFromQSslError(QSslError::SslError e);
+    KIOCORE_EXPORT static KSslError::Error errorFromQSslError(QSslError::SslError e);
     KIOCORE_EXPORT static QSslError::SslError errorFromKSslError(KSslError::Error e);
 
     QSslError error;
diff --git a/src/core/tcpslavebase.cpp b/src/core/tcpslavebase.cpp
--- a/src/core/tcpslavebase.cpp
+++ b/src/core/tcpslavebase.cpp
@@ -26,6 +26,7 @@
 
 #include "tcpslavebase.h"
 #include "kiocoredebug.h"
+#include "ksslerror_p.h"
 
 #include <kconfiggroup.h>
 #include <ksslcertificatemanager.h>
@@ -108,7 +109,7 @@
         for (const QSslCertificate &cert : peerCertificateChain ) {
             for (const KSslError &error : qAsConst(sslErrors)) {
                 if (error.certificate() == cert) {
-                    errorStr += QString::number(static_cast<int>(error.error())) + QLatin1Char('\t');
+                    errorStr += QString::number(static_cast<int>(KSslErrorPrivate::errorFromKSslError(error.error()))) + QLatin1Char('\t');
                 }
             }
             if (errorStr.endsWith(QLatin1Char('\t'))) {
diff --git a/src/widgets/jobuidelegate.cpp b/src/widgets/jobuidelegate.cpp
--- a/src/widgets/jobuidelegate.cpp
+++ b/src/widgets/jobuidelegate.cpp
@@ -362,7 +362,7 @@
                             sslMetaData.value(QStringLiteral("ssl_cipher")),
                             sslMetaData.value(QStringLiteral("ssl_cipher_used_bits")).toInt(),
                             sslMetaData.value(QStringLiteral("ssl_cipher_bits")).toInt(),
-                            KSslInfoDialog::errorsFromString(sslMetaData.value(QStringLiteral("ssl_cert_errors"))));
+                            KSslInfoDialog::certificateErrorsFromString(sslMetaData.value(QStringLiteral("ssl_cert_errors"))));
             kid->exec();
         } else {
             result = -1;
diff --git a/src/widgets/ksslinfodialog.h b/src/widgets/ksslinfodialog.h
--- a/src/widgets/ksslinfodialog.h
+++ b/src/widgets/ksslinfodialog.h
@@ -110,7 +110,17 @@
     void setMainPartEncrypted(bool);
     void setAuxiliaryPartsEncrypted(bool);
 
-    static QList<QList<KSslError::Error> > errorsFromString(const QString &s);
+#if KIOCORE_ENABLE_DEPRECATED_SINCE(5, 65)
+    /** @deprecated since 5.65, use certificateErrorsFromString */
+    KIOCORE_DEPRECATED_VERSION(5, 65, "use the QSslError variant")
+    static QList<QList<KSslError::Error> > errorsFromString(const QString &s); // TODO KF6 remove
+#endif
+    /**
+     * Converts certificate errors as provided in the "ssl_cert_errors" meta data
+     * to a list of QSslError::SslError values per certificate in the certificate chain.
+     * @since 5.65
+     */
+    static QList<QList<QSslError::SslError>> certificateErrorsFromString(const QString &errorsString);
 
 private:
     void updateWhichPartsEncrypted();
diff --git a/src/widgets/ksslinfodialog.cpp b/src/widgets/ksslinfodialog.cpp
--- a/src/widgets/ksslinfodialog.cpp
+++ b/src/widgets/ksslinfodialog.cpp
@@ -251,7 +251,7 @@
         const QStringList sl2 = s.split(QLatin1Char('\t'), QString::SkipEmptyParts);
         for (const QString &s2 : sl2) {
             bool didConvert;
-            KSslError::Error error = static_cast<KSslError::Error>(s2.toInt(&didConvert));
+            KSslError::Error error = KSslErrorPrivate::errorFromQSslError(static_cast<QSslError::SslError>(s2.toInt(&didConvert)));
             if (didConvert) {
                 certErrors.append(error);
             }
@@ -261,3 +261,23 @@
     return ret;
 }
 
+//static
+QList<QList<QSslError::SslError>> KSslInfoDialog::certificateErrorsFromString(const QString &errorsString)
+{
+    const QStringList sl = errorsString.split(QLatin1Char('\n'), QString::KeepEmptyParts);
+    QList<QList<QSslError::SslError>> ret;
+    ret.reserve(sl.size());
+    for (const QString &s : sl) {
+        QList<QSslError::SslError> certErrors;
+        const QStringList sl2 = s.split(QLatin1Char('\t'), QString::SkipEmptyParts);
+        for (const QString &s2 : sl2) {
+            bool didConvert;
+            QSslError::SslError error = static_cast<QSslError::SslError>(s2.toInt(&didConvert));
+            if (didConvert) {
+                certErrors.append(error);
+            }
+        }
+        ret.append(certErrors);
+    }
+    return ret;
+}