Troubleshooting

Note

Yandex Calendar doesn't offer phone support. We only work with emails from users. This is efficient: you can attach screenshots to your email — this way, we'll solve the problem and help you faster.

The recommendations on this page may help you resolve the issue by yourself.

What happened?

Specify the problem:

Here's why the page doesn't load, you're getting error messages, and how to fix it:

Your browser blocks data

Unblock data following the instructions for your browser:

Yandex Browser
  1. Open the browser settings.
  2. Go to theWebsites tab.
  3. Scroll down and click Advanced site settings.
  4. Scroll down and find the Cookies section.
  5. Disable the Block third-party cookies option.
Mozilla Firefox
  1. Open the browser settings.
  2. Go to the Privacy & Security tab.
  3. Scroll down and find the Cookies and Site Data section.
  4. Click Manage Exceptions.
  5. Enter https://calendar.yandex.com in the Address of website line.
  6. Click Allow.
  7. Save the changes.
Google Chrome
  1. Open the browser settings.
  2. Select Privacy and security in the left-hand panel.
  3. In Site settings, select Cookies and other site data.
  4. Disable the Block third-party cookies option.
Opera
  1. Open the browser settings.
  2. Go to the Security tab.
  3. Go to Cookies and other site data.
  4. Disable the Block third-party cookies option.
Edge
  1. Open the browser settings.
  2. Select Cookies and site permissions in the left-hand panel.
  3. Select Manage and delete cookies and site data.
  4. Disable the Block third-party cookies option.
Internet Explorer
  1. Open the browser settings.
  2. Go to the Privacy tab.
  3. Click Advanced.
  4. Turn on the Disable automatic cookie management option.
  5. In the First-party cookies and Third-party cookies lists, select "Accept".
  6. Enable the Always allow first-party cookies option.
  7. Save the changes.

The browser doesn't display the page correctly

Your browser saves copies of the pages you visit in the cache to reduce traffic consumption. When you view these pages again, the browser can load their data from the memory. For example, if the browser loads your inbox page from the memory, you'll see an outdated number of new emails.

Try refreshing the page forcing it to load data from the internet.

If the problem persists, clear the browser cache and delete all cookies.

Add-ons are blocking Yandex Calendar

Yandex Mail may work incorrectly due to add-ons and extensions in your browser. To check this, temporarily disable them. If Yandex Calendar isn't working properly due to an ad blocker or an antivirus extension, add the Yandex Calendar site to the exceptions of this extension. To learn more, see Configure ad blockers and Configure exceptions for sites.

You're using an outdated browser

An outdated browser may not support the technologies used for loading pages quickly and easily. Install the latest version of your browser.

If the instructions didn't help, fill out the feedback form.

Symbols or strange characters may appear due to incorrect page encoding. The encoding can be changed by viruses or malware.

Check your computer for viruses with free antivirus software: Dr.Web CureIt! and Kaspersky Virus Removal Tool.

If the instructions didn't help, fill out the feedback form.

Here's why page elements don't display and how to fix it:

The browser doesn't display the page correctly

Your browser saves copies of the pages you visit in the cache to reduce traffic consumption. When you view these pages again, the browser can load their data from the memory. For example, if the browser loads your inbox page from the memory, you'll see an outdated number of new emails.

Try refreshing the page forcing it to load data from the internet.

If the problem persists, clear the browser cache and delete all cookies.

Add-ons are blocking Yandex Calendar

Yandex Mail may work incorrectly due to add-ons and extensions in your browser. To check this, temporarily disable them. If Yandex Calendar isn't working properly due to an ad blocker or an antivirus extension, add the Yandex Calendar page to the exceptions of this extension. See Configure ad blockers and Configure exceptions for sites to learn more.

You're using an outdated browser

An outdated browser may not support the technologies used for loading pages quickly and easily. Install the latest version of your browser.

Your internet speed dropped

Check your internet connection speed on yandex.com/internet. Close all tabs in the browser, except for Yandex Calendar. Disable applications that use the internet and reload the page.

If the instructions didn't help, fill out the feedback form.

When a security certificate error occurs, you get the message:

  • "Your connection is not secure".
  • "This site presents a security threat to your computer".
  • "Incorrect certificate".
  • "Error in security certificate".
  • "This is an untrusted connection".

Here's why you're getting security certificate errors and how to fix it:

Untrusted connection or invalid security certificate errors may occur due to a conflict between the browser and computer settings. These errors may also be caused by your antivirus software. To find out why you're getting the certificate error, look for its code at the end of the message.

Error code

Solution
  • ssl_error_bad_cert_domain

Make sure that the correct address is entered in the browser's address bar: calendar.yandex.com or passport.yandex.com, and com is followed by /, not a dot or any other character.
  • err_cert_date_invalid
  • sec_error_oscp_invalid_signing_cert
  • sec_error_expired_issuer_certificate
  • sec_error_expired_certificate
  • sec_error_ocsp_future_response

Make sure that the date and time are set correctly on the computer. If the wrong date or time is set, the system may incorrectly determine that the certificate period hasn't started yet or that it has already expired.
  • err_cert_common_name_invalid
  • err_cert_authority_invalid
  • sec_error_unknown_issuer

Make sure that your antivirus settings are not configured to check HTTPS connections. See more information about doing it in Kaspersky Internet Security and ESET NOD32 Smart Security under the table.
If you don't have an antivirus software on your computer, hackers may replace your security certificate using malware or an MITM attack. Check your computer for viruses with free antivirus software: Dr.Web CureIt! and Kaspersky Virus Removal Tool.

  1. Open the antivirus window and click in the lower-left corner.

  2. Go to the Advanced settings tab and select Network.

  3. In the Check secure connections block, select Do not check secure connections and confirm the action.

Disabling HTTPS connection checks in ESET NOD32 Smart Security

  1. Open the antivirus window, go to the Setup tab, and click Advanced setup.

  2. In Web and email → SSL/TLS, turn off the Enable SSL/TLS protocol filtering option.

  3. In Web and email → Web access protection → Web protocols → HTTPS scanner setup, turn off the Enable HTTPS scanning option.

  4. Click OK to save changes.

If the instructions didn't help, fill out the feedback form.

Fill out the feedback form. Contact Yandex about the problem. Tell us about the problem in detail — when it appeared, what actions you took to solve it, and in what order. Where possible, take a screenshot. Please also tell which browser you use and name its version.

Specify the problem:

If you got an error message, it means that our security system finds your account suspicious. Possible reasons are that there's no phone number linked to your account or that the full name in your account is fictitious.

As such, you'll be temporarily blocked from creating events in Yandex Calendar. To resolve this issue, please provide accurate information in your account settings and link your phone number on the Phone numbers page. The block will be lifted automatically.

If the instructions didn't help, fill out the feedback form.

If you don't get event reminders, fill out the feedback form. In your message, include:

  • The link to the event.
  • The selected notification method.
  • The Yandex username that invited you to the event
  • Your Yandex username

If you don't get event invitations, fill out the feedback form. In your message, specify:

  • The link to the event that you didn't receive an invitation to.
  • The selected notification method.
  • The Yandex username that invited you to the event
  • Your Yandex username

The Creating an event section may help. If the instructions didn't help, fill out the feedback form.

Please specify where you're trying to set up syncing

You can't sync Yandex Calendar with Outlook just yet. If you're using a different software, contact support via the feedback form. In your message, specify:

  • Your username.
  • The link you want to use for syncing (in the calendar settings, go to the Export tab, select the format you need, and copy the address).
  • Error time.
  • A screenshot containing the error message.
  • The name and version of the email software.

If syncing doesn't work on an iOS smartphone, check the advanced settings:

  • SSL: Yes

  • Port: 443

  • Account URL: https://caldav.yandex.ru/principals/users/your_username@your_domain/

If Yandex Calendar still won't sync with your mobile device, fill out the feedback form. In your message, include:

  • The link to the calendar.
  • Some screenshots showing the settings of the software you use for syncing.
  • A screenshot containing the error message.
  • The device model and its operating system version.

If Yandex Calendar isn't syncing with your mobile device, fill out the feedback form. In your message, include:

  • The link to the calendar.
  • Some screenshots showing the settings of the software you use for syncing.
  • A screenshot containing the error message.
  • The device model and its operating system version.
Contact support
Previous
Yandex 360 for Business