Minor changes

src/components/UI/CustomModal.js

   p: 4,
 };
 
-const CustomModal = ({ open, onCloseModal, children, classes }) => {
+const CustomModal = ({ open = false, onCloseModal, children, classes }) => {
   const handleClose = () => onCloseModal();
 
   return (

src/pages/FilesPage/FileTable.js

   }, [data]);
 
   const getTotalNumberOfPages = (data) => {
+    if (data !== null && !data.total) return 1;
+
     return parseInt(data.total) <= PAGE_SIZE_FILES
       ? 1
       : Math.ceil(parseInt(data.total) / PAGE_SIZE_FILES);
         },
       })
     );
-    setFile(null)
+    setFile(null);
   };
 
   const input = (
       />
       <CustomModal
         classes="files-viewer-custom-modal"
-        open={file && matches}
+        open={file !== null && matches !== null ? file && matches : false}
         onCloseModal={() => setFile(null)}
       >
         {file !== null ? (