IE11 issue about filestack-react HOT 4 OPEN

            <ReactFilestack
                apikey={this.props.apiKey}
                customRender={({ onPick }) => (
                    <button
                        className={classNames('btn-stu btn-primary-stu', this.props.className)}
                        data-test-selector="filestack-button"
                        onClick={(e) => {
                            this.props.onClick();
                            onPick(e);
                        }}
                    >
                        {Lang.get('upload_from_cloud')}
                    </button>
                )}
                clientOptions={{
                    sessionCache: true,
                }}
                actionOptions={{
                    fromSources: [
                        'googledrive',
                        'dropbox',
                        'onedrive',
                    ],
                    accept: [
                        'application/pdf',
                        'application/msword',
                        'application/vnd.openxmlformats-officedocument.wordprocessingml.document',
                    ],
                    maxFiles: 100,
                    onFileUploadStarted: this.props.onUploadFileStarted,
                    onFileSelected: this.handleFileSelected,
                    customText: { ... },
                }}
                onSuccess={this.handleDocumentsUploadedFromCloud}
            />