CertFindCertificateInStore failed with: (-2146885628) Cannot find object or property.

For the benefit of other community members, here's the response i had from Dropbox directly on this matter!

From Dropbox:

The file dbxsvc.exe is a component that we use as part of the Dropbox Sync Experience. Should you not be a team user, or not sync online-only files, then this file will never start operating. It is, however, created at install for all users regardless of whether you are opted in.
Please note that the issue you are experiencing is technically the volume of times it is writing to the error log, rather than any issue indicated by the process's presence in that error log. In short, due to the way Microsoft categorizes something as report-worthy, we would expect the process to be mentioned in that log 3 times every 24 hours. We want to reassure you that everything is working properly and that doesn't indicate a fault.
With that in mind, we understand that you may not wish to see this behavior and apologize if these entries were concerning to you.
We would not recommend attempting to disable dbxsvc.exe. Please note that updating the desktop application or re-installing it will also attempt to re-add this process.
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From me:

I’ve never heard such a load of rubbish in my whole life. Suggest you speak to someone in your dev team who understands these things and come back with a proper answer. The service is trying to access a certificate that doesn’t exist or for which it doesn’t have permission. If, as you say, the service is not required - the code should not be trying to access the certificate.

“ the issue you are experiencing is technically the volume of times it is writing to the error log, rather than any issue indicated by the process's presence in that error log” makes no sense. The event log doesn’t monitor volume of transactions & insert spurious errors about certificates for fun.

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From Dropbox:

I understand the frustration but unfortunately, there's no different response from our end regarding this matter.
The dbxsvc.exe service will be installed and running as long as the Dropbox desktop application is installed. It is used to either install or uninstall dbx.sys when a user chooses to opt into or out of Sync features.
If the dbxsvc.exe is not running or does not exist, the Dropbox desktop application will not be able to install dbx.sys, the minifilter to enable Sync features. The Dropbox desktop application doesn't have administrator rights to install or load the driver, these actions are preformed by the dbxsvc.exe service.
If there is anything else I can do for you, please let me know.
Have a great day!