This question was asked by someone in December 2019. The advice was to run the QcleanUI utility and then reinstall the Quicken application. These were the instructions:
https://www.quicken.com/support/using-qcleanui-uninstall-quicken I have the same problem. I am running Quicken Premier R24.11, although this was happening before Quicken updated tonight.
I followed the instructions, removed Quicken and re-installed it. I still get the same problem.
Please advise.