diff --git a/src/plugin/callback_msg.rs b/src/plugin/callback_msg.rs
index 9a82adfec..2a3b43247 100644
--- a/src/plugin/callback_msg.rs
+++ b/src/plugin/callback_msg.rs
@@ -279,7 +279,6 @@ fn request_plugin_sign(id: String, msg_to_rustdesk: MsgToRustDesk) -> PluginRetu
         "parse signature data '{}'",
         signature_data
     );
-    // to-do: Request server to sign the data.
     thread::spawn(move || {
         let sign_url = format!("{}/lic/web/api/plugin-sign", get_api_server());
         let client = reqwest::blocking::Client::new();
@@ -311,7 +310,16 @@ fn request_plugin_sign(id: String, msg_to_rustdesk: MsgToRustDesk) -> PluginRetu
                                 &[],
                             ) {
                                 Ok(ret) => {
-                                    assert!(!ret.msg.is_null());
+                                    debug_assert!(!ret.msg.is_null(), "msg is null");
+                                    if ret.msg.is_null() {
+                                        // unreachable
+                                        log::error!(
+                                            "The returned message pointer of plugin status is null, plugin id: '{}', code: {}",
+                                            id,
+                                            ret.code,
+                                        );
+                                        return;
+                                    }
                                     let msg = cstr_to_string(ret.msg).unwrap_or_default();
                                     free_c_ptr(ret.msg as _);
                                     if ret.code == super::errno::ERR_SUCCESS {
diff --git a/src/plugin/mod.rs b/src/plugin/mod.rs
index f19f67dd1..bc97e5cfb 100644
--- a/src/plugin/mod.rs
+++ b/src/plugin/mod.rs
@@ -76,11 +76,18 @@ impl PluginReturn {
         }
     }
 
-    pub fn get_code_msg(&mut self) -> (i32, String) {
+    pub fn get_code_msg(&mut self, id: &str) -> (i32, String) {
         if self.is_success() {
             (self.code, "".to_owned())
         } else {
-            debug_assert!(!self.msg.is_null(), "msg is null");
+            if self.msg.is_null() {
+                log::warn!(
+                    "The message pointer from the plugin '{}' is null, but the error code is {}",
+                    id,
+                    self.code
+                );
+                return (self.code, "".to_owned());
+            }
             let msg = cstr_to_string(self.msg).unwrap_or_default();
             free_c_ptr(self.msg as _);
             self.msg = null();
@@ -146,7 +153,6 @@ fn get_uninstall_file_path() -> ResultType<PathBuf> {
 
 #[inline]
 fn cstr_to_string(cstr: *const c_char) -> ResultType<String> {
-    assert!(!cstr.is_null(), "cstr must be a valid pointer");
     if cstr.is_null() {
         bail!("failed to convert string, the pointer is null");
     }
diff --git a/src/plugin/plugins.rs b/src/plugin/plugins.rs
index 83308b643..b969e2a82 100644
--- a/src/plugin/plugins.rs
+++ b/src/plugin/plugins.rs
@@ -213,7 +213,7 @@ macro_rules! make_plugin {
             fn init(&self, data: &InitData, path: &str) -> ResultType<()> {
                 let mut init_ret = (self.init)(data as _);
                 if !init_ret.is_success() {
-                    let (code, msg) = init_ret.get_code_msg();
+                    let (code, msg) = init_ret.get_code_msg(path);
                     bail!(
                         "Failed to init plugin {}, code: {}, msg: {}",
                         path,
@@ -227,7 +227,7 @@ macro_rules! make_plugin {
             fn clear(&self, id: &str) {
                 let mut clear_ret = (self.clear)();
                 if !clear_ret.is_success() {
-                    let (code, msg) = clear_ret.get_code_msg();
+                    let (code, msg) = clear_ret.get_code_msg(id);
                     log::error!(
                         "Failed to clear plugin {}, code: {}, msg: {}",
                         id,
@@ -428,7 +428,7 @@ pub fn plugin_call(id: &str, method: &[u8], peer: &str, event: &[u8]) -> ResultT
     if ret.is_success() {
         Ok(())
     } else {
-        let (code, msg) = ret.get_code_msg();
+        let (code, msg) = ret.get_code_msg(id);
         bail!(
             "Failed to handle plugin event, id: {}, method: {}, code: {}, msg: {}",
             id,
@@ -496,7 +496,7 @@ fn _handle_listen_event(event: String, peer: String) {
                         evt_bytes.len(),
                     );
                     if !ret.is_success() {
-                        let (code, msg) = ret.get_code_msg();
+                        let (code, msg) = ret.get_code_msg(&id);
                         log::error!(
                             "Failed to handle plugin listen event, id: {}, event: {}, code: {}, msg: {}",
                             id,
@@ -540,7 +540,7 @@ pub fn handle_client_event(id: &str, peer: &str, event: &[u8]) -> Message {
                 free_c_ptr(out as _);
                 msg
             } else {
-                let (code, msg) = ret.get_code_msg();
+                let (code, msg) = ret.get_code_msg(id);
                 if code > ERR_RUSTDESK_HANDLE_BASE && code < ERR_PLUGIN_HANDLE_BASE {
                     log::debug!(
                         "Plugin {} failed to handle client event, code: {}, msg: {}",