Specifically assign 0 when not provider passed in

installers/common.sh

@@ -425,12 +425,13 @@ function _prompt_install_feature() {
             $function
         fi
     elif [ "$opt" == "pv_option" ]; then
-        local opt_value=${!opt}
-        # Skip silently if not requested (opt_value is 0)
+        # pv_option has multiple options and is not a normal binary flag [enabled(1)/disabled(0)].
+        # We must evaluate the input flag and its value in this block
+        local opt_value=${!opt:-0} # Default to zero if somehow pv_option is still assigned as to null.
         if [ "$opt_value" == 0 ]; then
-            echo "(Skipped)"
+            echo "(Skipped)" # Skip if VPN Provider not selected / assigned
         else
-            # Iterate over the VPN provider options
+            # Iterate over the defined VPN providers by pulling the valid providers from the config file
             local valid_ids=($(jq -r '.providers[].id' "$webroot_dir/config/vpn-providers.json"))
             local found=0
             for id in "${valid_ids[@]}"; do
@@ -440,14 +441,14 @@ function _prompt_install_feature() {
                 fi
             done
             if [ $found == 1 ]; then
-                echo -e
+                echo -e # Newline for UI / clean output
                 $function
             else
                 _install_status 1 "Invalid VPN provider ID $opt_value - (Skipped)"
             fi
         fi
     elif [ "${!opt}" == 1 ]; then
-        echo -e
+        echo -e # Newline for UI / clean output
         $function
     else
         echo "(Skipped)"