Warn when no active mpris player is found

previously would panic

src/mpris_client.rs

@@ -1,3 +1,4 @@
+use log::warn;
 use mpris::Player;
 use mpris::PlayerFinder;
 use regex::Regex;
@@ -36,10 +37,15 @@ where
 {
     let player = PlayerFinder::new()
         .expect("Could not connect to D-Bus")
-        .find_active()
-        .expect("Could not find any player");
-
-    function(&player);
+        .find_active();
+    match player {
+        Ok(p) => {
+            function(&p);
+        }
+        Err(err) => {
+            warn!("Could not find an active player: {err}");
+        }
+    }
 }
 
 fn exec_functionality<F>(player_id: Option<&str>, exec_closure: F)