You can always uninstall and reinstall the software (sounds like some files are either corrupt or missing entirely in your case). Ensure that you save your .tax2018 file(s) in a safe place (separate hard drive, SSD, flash drive, etc.).
If you cannot resolve these errors, then you should contact Support (link below) during regular business hours.
https://ttlc.intuit.com/community/using-turbotax/help/what-is-the-turbotax-phone-number/00/25632
