Hello @Iswan ,
We are sorry that you seem to be affected by online banking issues as well. Thank you for letting us know about this here on the Quicken Community.
How long has this error been occuring? If this has been ongoing for more than 24 hours, then I recommend speaking with Quicken Support by making use of the information provided here. They will need to work with you in order to troubleshoot and diagnose this issue in greater detail with the tools and resources available to them, uniquely. I do wish that we could provide more advice from the Quicken Community, but Support's help will be necessary in this situation.
I hope that is helpful, and feel free to reach out with any additional questions or concerns