1) Let's try some "Troubleshooting 101" to ensure the Quicken software is installed and updated properly.
What is the exact release number for your version of Quicken? If clicking on Help / About Quicken does not show one of the following you are missing required software updates.
Quicken US version:
- 2017 ... Release R 19.7 *, https://www.quicken.com/support/quicken-2017-windows-release-notes-updates-and-mondo-patch - 2018 ... users with an active subscription were upgraded to 2019 when installing the R 14.23 patch released 10/8/2018 or any later patch
- 2019 … users with an active subscription were upgraded to 2020 when installing the R 23.14 patch released on or about 11/5/2019 or any later patch - 2020 ... Release R 24.11 *, https://www.quicken.com/support/update-and-mondo-patch-20182019-release-quicken-windows-subscription-product
Quicken Canada version:
- 2017 ... users with an active subscription should have been upgraded to 2018 already - 2018 ... users with an active subscription were upgraded to 2019 when installing the R 15.24 patch or any later patch
- 2019 ... users with an active subscription were upgraded to 2020 when installing the R 22.11 patch released on or about 11/11/2019 or any later patch - 2020 ... Release R 22.15 *, https://www.quicken.com/support/update-and-mondo-patch-20182019-release-quicken-windows-subscription-product
( * minimum required release number, may be higher, subject to change without notice)
Please do this even if you are on the latest release already: Locate the US or Canada Mondo Patch file applicable to your version of Quicken in the links above. Download it and save it to disk. Open the Downloads folder. Right-click the downloaded patch file. Click "Run as Administrator" to execute the installation program. This will replace any Quicken software modules with a known consistent release level and, hopefully, eliminate any software corruption or errors during installation as a cause of this issue.
Reboot Windows when done with the above and try Quicken again.
2) Restore your Quicken data file from a Manual or Automatic Backup taken prior to installing Q 2020, if necessary going back to older backups until you find a file that is not missing any transactions.https://www.quicken.com/support/how-backup-or-restore-your-quicken-data