In such situation, you can use an Outlook repair tool such as Stellar Repair for Outlook to scan corrupt PST files and repair it to regain all contents such as e-mails, attachments, contacts, calendars, tasks, notes, and journals, etc. SCANPST.EXE may stop working due to its limitations, such as it can’t fix an encrypted or larger PST file (2GB or more). What should I do if SCANPST.EXE Does Not Work or Stops Working in Outlook 2016, 2013 & earlier versions?
So, check for Window’s updates and install them. Windows updates not only brings new features, security patches but also updates to MS Outlook and other Microsoft applications. Sometimes installing the latest Windows updates on your PC, where Outlook 2016 is installed, can fix these Outlook errors.
You can try to repair the MS Office installation by following these steps, If MS Office installation is damaged or files are missing due to some malware or virus intrusion, system crash or disk error, it can cause Outlook to stop working.