[MM-57826] Make sure the original errors are wrapped when AppErrors are returned (#26771)

Co-authored-by: Ibrahim Serdar Acikgoz <serdaracikgoz86@gmail.com>

server/channels/api4/license_local.go

@@ -48,7 +48,7 @@ func localAddLicense(c *Context, w http.ResponseWriter, r *http.Request) {
 
 	file, err := fileData.Open()
 	if err != nil {
-		c.Err = model.NewAppError("addLicense", "api.license.add_license.open.app_error", nil, err.Error(), http.StatusBadRequest)
+		c.Err = model.NewAppError("addLicense", "api.license.add_license.open.app_error", nil, "", http.StatusBadRequest).Wrap(err)
 		return
 	}
 	defer file.Close()