diff --git a/src-tauri/src/commands/proxmox.rs b/src-tauri/src/commands/proxmox.rs
index 2338ed5c..7b23ce99 100644
--- a/src-tauri/src/commands/proxmox.rs
+++ b/src-tauri/src/commands/proxmox.rs
@@ -38,7 +38,7 @@ pub async fn add_proxmox_cluster(
     cluster_type: ClusterType,
     connection: ClusterConnection,
     username: String,
-    password: &str,
+    password: String,
     state: State<'_, AppState>,
 ) -> Result<ClusterInfo, String> {
     // Create client (no live auth — credentials stored and used on first connect)
diff --git a/src-tauri/src/proxmox/client.rs b/src-tauri/src/proxmox/client.rs
index d2da7f84..d8b7485e 100644
--- a/src-tauri/src/proxmox/client.rs
+++ b/src-tauri/src/proxmox/client.rs
@@ -57,7 +57,10 @@ impl ProxmoxClient {
     /// Authenticate with root username and password
     /// Returns the API ticket for subsequent requests
     pub async fn authenticate(&self, password: &str) -> Result<String> {
-        let url = format!("{}/api2/json/access/ticket", self.base_url);
+        let url = format!(
+            "https://{}:{}/api2/json/access/ticket",
+            self.base_url, self.port
+        );
 
         let params = vec![("username", self.username.as_str()), ("password", password)];
 
@@ -95,8 +98,9 @@ impl ProxmoxClient {
     /// Get the full API URL for a given path
     fn get_api_url(&self, path: &str) -> String {
         format!(
-            "{}/api2/json/{}",
+            "https://{}:{}/api2/json/{}",
             self.base_url,
+            self.port,
             path.trim_start_matches('/')
         )
     }
@@ -266,30 +270,34 @@ impl ProxmoxClient {
 mod tests {
     use super::*;
 
+    // The frontend strips the protocol via parseRemoteUrl before sending to the backend,
+    // so ProxmoxClient always receives a bare hostname (no scheme, no port).
+    // get_api_url() is responsible for constructing the full https URL with port.
+
     #[test]
     fn test_proxmox_client_new() {
-        let client = ProxmoxClient::new("https://pve.example.com", 8006, "root@pam");
-        assert_eq!(client.base_url(), "https://pve.example.com");
+        let client = ProxmoxClient::new("pve.example.com", 8006, "root@pam");
+        assert_eq!(client.base_url(), "pve.example.com");
         assert_eq!(client.port(), 8006);
         assert_eq!(client.username(), "root@pam");
     }
 
     #[test]
     fn test_proxmox_client_with_trailing_slash() {
-        let client = ProxmoxClient::new("https://pve.example.com/", 8006, "root@pam");
-        assert_eq!(client.base_url(), "https://pve.example.com");
+        let client = ProxmoxClient::new("pve.example.com/", 8006, "root@pam");
+        assert_eq!(client.base_url(), "pve.example.com");
     }
 
     #[test]
     fn test_get_api_url() {
-        let client = ProxmoxClient::new("https://pve.example.com", 8006, "root@pam");
+        let client = ProxmoxClient::new("pve.example.com", 8006, "root@pam");
         assert_eq!(
             client.get_api_url("cluster/resources"),
-            "https://pve.example.com/api2/json/cluster/resources"
+            "https://pve.example.com:8006/api2/json/cluster/resources"
         );
         assert_eq!(
             client.get_api_url("/cluster/resources"),
-            "https://pve.example.com/api2/json/cluster/resources"
+            "https://pve.example.com:8006/api2/json/cluster/resources"
         );
     }
 }
diff --git a/src/components/Proxmox/AddRemoteForm.tsx b/src/components/Proxmox/AddRemoteForm.tsx
index eabc21bd..9b6bbf31 100644
--- a/src/components/Proxmox/AddRemoteForm.tsx
+++ b/src/components/Proxmox/AddRemoteForm.tsx
@@ -61,7 +61,7 @@ export function AddRemoteForm({ onAdd, onCancel }: AddRemoteFormProps) {
     try {
       await onAdd(config);
     } catch (err) {
-      setError(err instanceof Error ? err.message : 'Failed to add remote');
+      setError(String(err));
     } finally {
       setLoading(false);
     }