diff --git a/misc/alpine-install.func b/misc/alpine-install.func
index 597d58c6a..49b83dbae 100644
--- a/misc/alpine-install.func
+++ b/misc/alpine-install.func
@@ -105,7 +105,16 @@ network_check() {
 update_os() {
   msg_info "Updating Container OS"
   $STD apk -U upgrade
-  source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/tools.func)
+  local tools_content
+  tools_content=$(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/tools.func) || {
+    msg_error "Failed to download tools.func"
+    exit 6
+  }
+  source /dev/stdin <<<"$tools_content"
+  if ! declare -f fetch_and_deploy_gh_release >/dev/null 2>&1; then
+    msg_error "tools.func loaded but incomplete — missing expected functions"
+    exit 6
+  fi
   msg_ok "Updated Container OS"
   post_progress_to_api
 }
diff --git a/misc/api.func b/misc/api.func
index da5a51ed0..977e326c5 100644
--- a/misc/api.func
+++ b/misc/api.func
@@ -875,6 +875,9 @@ categorize_error() {
   # Network errors (curl/wget)
   6 | 7 | 22 | 35) echo "network" ;;
 
+  # Docker / Privileged mode required
+  10) echo "config" ;;
+
   # Timeout errors
   28 | 124 | 211) echo "timeout" ;;
 
diff --git a/misc/build.func b/misc/build.func
index 7c6baa33c..a6cd78b52 100644
--- a/misc/build.func
+++ b/misc/build.func
@@ -297,7 +297,7 @@ validate_container_id() {
   # Falls back gracefully if pvesh unavailable or returns empty
   if command -v pvesh &>/dev/null; then
     local cluster_ids
-    cluster_ids=$(pvesh get /cluster/resources --type vm --output-format json 2>/dev/null | 
+    cluster_ids=$(pvesh get /cluster/resources --type vm --output-format json 2>/dev/null |
       grep -oP '"vmid":\s*\K[0-9]+' 2>/dev/null || true)
     if [[ -n "$cluster_ids" ]] && echo "$cluster_ids" | grep -qw "$ctid"; then
       return 1
@@ -5273,6 +5273,6 @@ api_exit_script() {
 if command -v pveversion >/dev/null 2>&1; then
   trap 'api_exit_script' EXIT
 fi
-trap 'ensure_log_on_host; post_update_to_api "failed" "$?"' ERR
+trap 'local _ec=$?; if [[ $_ec -ne 0 ]]; then ensure_log_on_host; post_update_to_api "failed" "$_ec"; fi' ERR
 trap 'ensure_log_on_host; post_update_to_api "failed" "130"; exit 130' SIGINT
 trap 'ensure_log_on_host; post_update_to_api "failed" "143"; exit 143' SIGTERM
diff --git a/misc/install.func b/misc/install.func
index 8ec1838fa..ed7205c7d 100644
--- a/misc/install.func
+++ b/misc/install.func
@@ -228,7 +228,16 @@ EOF
   msg_ok "Updated Container OS"
   post_progress_to_api
 
-  source <(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/tools.func)
+  local tools_content
+  tools_content=$(curl -fsSL https://raw.githubusercontent.com/community-scripts/ProxmoxVE/main/misc/tools.func) || {
+    msg_error "Failed to download tools.func"
+    exit 6
+  }
+  source /dev/stdin <<<"$tools_content"
+  if ! declare -f fetch_and_deploy_gh_release >/dev/null 2>&1; then
+    msg_error "tools.func loaded but incomplete — missing expected functions"
+    exit 6
+  fi
 }
 
 # ==============================================================================