After investigating this particular issue, there are several different underlying causes that might be responsible for triggering this particular error code. Here’s a list of potential culprits that might be responsible for the apparition of this problem: Now that you know every potential culprit that might be responsible for this particular issue, here are a couple of verified methods that other affected users have successfully used to fix this annoying syncing issue with Google accounts on Windows 10:

Method 1: Letting Apps access Calendar data

In most documented cases, this particular issue is caused by an instance in which the Calendar app is configured in such a way that no Windows 10 apps (native or not) can access Calendar data from it. Depending on your Windows version and if you have migrated it from an older Windows version, you might found that this setting was disabled by default. If this scenario is applicable, you should be able to fix the problem by accessing the Privacy Settings of Calendar and enabling the Let apps access my calendar.  If you’re looking for step by step instructions move down to the next potential fix below: If the Calendar app is still not syncing correctly when connected to your Google account, move down to the next potential fix below.

Method 2: Re-syncing Google Calendar

Once you’ve made sure that you’re not encountering this issue due to a permission issue, you should also consider that this syncing issue is occurring due to a temporary glitch with the Calendar app on Windows 10. Several affected users that were dealing with the same problem have confirmed that they finally managed to fix the issue by temporarily disabling the sync settings of the Calendar app before re-enabling it again. If you haven’t tried this yet, follow the instructions below to launch the Calendar app on your computer and force it to re-sync all data via the Settings menu: In case the same kind of issue is still occurring, move down to the next potential fix below.

Method 3: Disable 2-Factor Authentication on your Google Account (if applicable)

As it turns out, you can also expect to face these types of syncing issues if you have 2-Factor Authentication enabled on your Google Account. I lot of users that were using 2-Factor authentication for Google have reported that they only managed to fix the issue after they disabled 2-Factor authentication on their computer. Update: If you’re not willing to disable two-factor authentication on your Google account in order to fix this syncing issue, you will have to generate a password for the Windows Mail app in your Google account from the Apps & Passwords tab. If this scenario is applicable and you’re using 2-Factor authentication for your Google account, you can probably fix the syncing issues inside the Calendar app by accessing your Google account settings and disabling the feature for every connected app. Follow the instructions below to disable 2-Factor Authentication on your Google Account: If this method didn’t fix your syncing issues or the steps above were not applicable to your particular situation, move down to the next potential fix below.

Method 4: Reset the Mail & Calendar apps

If none of the other fixes above have worked in your case, you should consider the possibility that you’re dealing with some type of corrupted cached data that is preventing the Calendar app from syncing events properly. Fortunately, as it’s been confirmed by several affected users, you might be able to fix this problem by resetting the Calendar app via the official channels – But since the Calendar app and Mail app share the same dashboard, you will need to reset both. If you’re encountering this issue on Windows 10 and you haven’t tried fixing the issue by resetting the Calendar app yet, follow the instructions below: In case the same problem is still occurring, move down to the next potential fix below.

Method 5: Deleting the Temporary Files

If none of the methods above have been effective in your particular case, there’s one last thing you can do in order to fix the problem is to remove the Gmail account that’s currently connected to the Calendar app and clearing the Temporary files before syncing the account once again. Several affected users have confirmed that this approach was the only thing that successfully allowed them to finally fix the syncing bug associated with their Google account. If this scenario is applicable and you haven’t tried to do this yet, follow the instructions below to remove your google account before deleting the temporary files that might be causing issues with your Google account:

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