Thank you for taking the time to visit the Community to post your issue, although I apologize that you are unable to sign in.
At this time I would recommend contacting support directly for advanced troubleshooting steps.
https://www.quicken.com/support#contact-support
Quicken Care has the tools to review and research this issue further.
Thank you,
-Quicken Tyka
Are you getting "Oops, something went wrong"? Have you recently enabled a VPN? If so, this might be the problem. Try turning the VPN off and see if that helps.
Please verify this:
In Windows Control Panel / System / Advanced System Settings / Environment Variables ensure that both the TEMP and TMP variables point to a valid and existing folder, typically C:\Windows\Temp or C:\Users\your_username_here\AppData\Local\Temp If they point to an incorrect or non-existent folder or drive change both variables to an existing folder on C:\ e.g., C:\Temp (or create one) and reboot Windows.
If the folder exists … does your Windows User Account have proper access rights to this folder? If Quicken cannot create and use temporary files, all sorts of malfunctions will occur. If the Temp folder is full of junk, clean it out. Delete all files and subfolders within the Temp folder structure that Windows allows you to delete. You may have to skip a few that are actively in use.
Make sure that files in the Temp folder are NOT accessed by cloud backup software at all.
Run CHKDSK /r on your C: - drive (or perform Error Checking from Windows File Explorer, Properties, Tools tab).