diff --git a/frontend/index.html b/frontend/index.html
index 8e60d77..15c3b0a 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -2131,14 +2131,12 @@ function onBerSubTypeChange(sel) {
 		if (type === 'error') {
 			body.innerHTML = buildErrorActionRow(row.dataset.berIdx);
 			const recoveryBuilder = body.querySelector('.error-recovery-builder');
-			const recoveryHtml = berRowHtml(0, 'immediate');
-			const tempDiv = document.createElement('div');
-			tempDiv.innerHTML = recoveryHtml;
-			const recoveryBody = tempDiv.querySelector('.ber-body');
-			const recoverySubBody = recoveryBody.querySelector('.ber-sub-body');
-			const recoverySubtype = recoverySubBody.querySelector('.ber-subtype');
-			recoverySubtype.value = 'proactive';
-			onBerSubTypeChange(recoverySubtype);
+			recoveryBuilder.innerHTML = berRowHtml(0, 'immediate');
+			const recoverySubtype = recoveryBuilder.querySelector('.ber-subtype');
+			if (recoverySubtype) {
+				recoverySubtype.value = 'proactive';
+				onBerSubTypeChange(recoverySubtype);
+			}
 		} else {
 			body.innerHTML = `<select class="ber-action text-xs border border-gray-300 dark:border-slate-600 rounded px-1 py-1 dark:bg-slate-700 dark:text-slate-300 font-mono" onchange="updateBerRow(this)">
 				<option value="81">81 (Session indication)</option>