Fix error comparisons

server/subsonic/api.go

@@ -3,6 +3,7 @@ package subsonic
 import (
 	"encoding/json"
 	"encoding/xml"
+	"errors"
 	"fmt"
 	"net/http"
 	"runtime"
@@ -183,7 +184,7 @@ func h(r chi.Router, path string, f handler) {
 		if err != nil {
 			// If it is not a Subsonic error, convert it to an ErrorGeneric
 			if _, ok := err.(subError); !ok {
-				if err == model.ErrNotFound {
+				if errors.Is(err, model.ErrNotFound) {
 					err = newError(responses.ErrorDataNotFound, "data not found")
 				} else {
 					err = newError(responses.ErrorGeneric, "Internal Error")