cant use workspace app

i was wonder after i install the new android oreo update i have an app called work space where i store my private files pic etc. suddenly i notice after i restarted my phone the appy was not there in my phone screen. as i check in the setting menu in the app secton the workspace apps was still there but unusable. the worst part i cant access my private files so that i can move it to personal mode. is there someone could fix this problem thanks!