diff --git a/.github/workflows/pr_dns.yml b/.github/workflows/pr_dns.yml
index b627d3ab..4d7a325d 100644
--- a/.github/workflows/pr_dns.yml
+++ b/.github/workflows/pr_dns.yml
@@ -4,8 +4,6 @@ on:
   pull_request_target:
     types:
       - opened
-    branches:
-      - 'dev'
     paths:
       - 'dnsapi/*.sh'
 
@@ -22,6 +20,7 @@ jobs:
               owner: context.repo.owner,
               repo: context.repo.repo,
               body: `**Welcome**
+                First thing: don't send PR to the master branch, please send to the dev branch instead.
                 Please make sure you've read our [DNS API Dev Guide](../wiki/DNS-API-Dev-Guide) and [DNS-API-Test](../wiki/DNS-API-Test).
                 Then reply on this message, otherwise, your code will not be reviewed or merged.
                 We look forward to reviewing your Pull request shortly ✨
diff --git a/acme.sh b/acme.sh
index 270a0531..38ccaade 100755
--- a/acme.sh
+++ b/acme.sh
@@ -2519,22 +2519,34 @@ _startserver() {
   _content_len="$(printf "%s" "$content" | wc -c)"
   _debug _content_len "$_content_len"
   _debug "_NC" "$_NC $SOCAT_OPTIONS"
+  export _SOCAT_ERR="$(_mktemp)"
   $_NC $SOCAT_OPTIONS SYSTEM:"sleep 1; \
 echo 'HTTP/1.0 200 OK'; \
 echo 'Content-Length\: $_content_len'; \
 echo ''; \
-printf '%s' '$content';" &
+printf '%s' '$content';" 2>"$_SOCAT_ERR" &
   serverproc="$!"
+  if [ -f "$_SOCAT_ERR" ]; then
+    if grep "Permission denied" "$_SOCAT_ERR" >/dev/null; then
+      _err "socat: $(cat $_SOCAT_ERR)"
+      _err "Can not listen for user: $(whoami)"
+      _err "Maybe try with root again?"
+      rm -f "$_SOCAT_ERR"
+      return 1
+    fi
+  fi
 }
 
 _stopserver() {
   pid="$1"
   _debug "pid" "$pid"
   if [ -z "$pid" ]; then
+    rm -f "$_SOCAT_ERR"
     return
   fi
 
   kill $pid
+  rm -f "$_SOCAT_ERR"
 
 }