Title: Big issue – ERROR: Invalid verification code + critical
Last modified: September 13, 2022
---
# Big issue – ERROR: Invalid verification code + critical
* Resolved [szrejder](https://wordpress.org/support/users/szrejder/)
* (@szrejder)
* [3 years, 8 months ago](https://wordpress.org/support/topic/big-issue-error-invalid-verification-code-critical/)
* Hello,
* There are issues, probably after updating. On multiple sites I manage, there
is a problem with login – almost every 2FA account gets “ERROR: Invalid verification
code.” even if it’s correct. It’s really big issue as I cant’ login to admin
account without fixing it manually.
* There is a critical error too:
* ```
WordPress w wersji 6.0.2
Aktualny motyw: Barberry Child (wersja 2.9.9)
Aktualna wtyczka: WP 2FA - Two-factor authentication for WordPress (wersja 2.3.0)
Wersja PHP: 8.1.2
Szczegóły błędu
===================
Błąd typu E_ERROR został spowodowany w linii 291 pliku /var/www/html/wp-content/plugins/wp-2fa/includes/classes/Authenticator/class-authentication.php. Komunikat błędu: Uncaught Exception: Invalid characters in the base32 string. in /var/www/html/wp-content/plugins/wp-2fa/includes/classes/Authenticator/class-authentication.php:291
Stack trace:
#0 /var/www/html/wp-content/plugins/wp-2fa/includes/classes/Authenticator/class-authentication.php(255): WP2FA\Authenticator\Authentication::base32_decode()
#1 /var/www/html/wp-content/plugins/wp-2fa/includes/classes/Authenticator/class-authentication.php(234): WP2FA\Authenticator\Authentication::calc_totp()
#2 /var/www/html/wp-content/plugins/wp-2fa/includes/classes/Authenticator/class-login.php(903): WP2FA\Authenticator\Authentication::is_valid_authcode()
#3 /var/www/html/wp-content/plugins/wp-2fa/includes/classes/Authenticator/class-login.php(719): WP2FA\Authenticator\Login::validate_totp_authentication()
#4 /var/www/html/wp-includes/class-wp-hook.php(307): WP2FA\Authenticator\Login::login_form_validate_2fa()
#5 /var/www/html/wp-includes/class-wp-hook.php(331): WP_Hook->apply_filters()
#6 /var/www/html/wp-includes/plugin.php(476): WP_Hook->do_action()
#7 /var/www/html/wp-settings.php(620): do_action()
#8 /var/www/html/wp-config.php(268): require_once('...')
#9 /var/www/html/wp-load.php(50): require_once('...')
#10 /var/www/html/wp-login.php(12): require('...')
#11 {main}
```
Viewing 5 replies - 1 through 5 (of 5 total)
* Plugin Contributor [robertabela](https://wordpress.org/support/users/robert681/)
* (@robert681)
* [3 years, 8 months ago](https://wordpress.org/support/topic/big-issue-error-invalid-verification-code-critical/#post-16008557)
* Hello [@szrejder](https://wordpress.org/support/users/szrejder/)
* Thank you for using our plugin.
* I am sorry to read about your issue. To confirm;
* 1) Are all accounts with 2FA enabled experiencing this problem? Or are there
accounts, which maybe have different 2FA method that they can still be used?
* 2) Is the error reported when there is the error that the code is invalid, or
is this showing up on separate occasions?
* The more information and details you can share with us the quicker we can identify
the issue.
* Thank you for your cooperation and we look forward to hearing from you.
* Thread Starter [szrejder](https://wordpress.org/support/users/szrejder/)
* (@szrejder)
* [3 years, 8 months ago](https://wordpress.org/support/topic/big-issue-error-invalid-verification-code-critical/#post-16008603)
* 1) Probably all of them, but I couldn’t test every account. Mainly authenticator
ones, but one e-mail authentication as well.
* 2) On one website it started appearing after trying to use one invalid code (
it made it impossible to login with a valid one), but on the other site I don’t
think that someone used invalid code.
* Issue persists even after I restarted my server.
* Plugin Contributor [robertabela](https://wordpress.org/support/users/robert681/)
* (@robert681)
* [3 years, 8 months ago](https://wordpress.org/support/topic/big-issue-error-invalid-verification-code-critical/#post-16011611)
* To look into this we need more information about your setup [@szrejder](https://wordpress.org/support/users/szrejder/)
* Can you please send us the system information for from the “Help & Contact us”
section in the plugin?
* Please send it over email at [support@wpwhitesecurity.com](https://wordpress.org/support/topic/big-issue-error-invalid-verification-code-critical/support@wpwhitesecurity.com?output_format=md)
and make reference to this ticket in the email. Do not share the file information
in this thread, since it contains technical information about your WordPress
setup.
* Thank you for your cooperation. We look forward to hearing from you.
* [pauljmartinez](https://wordpress.org/support/users/pauljmartinez/)
* (@pauljmartinez)
* [3 years, 8 months ago](https://wordpress.org/support/topic/big-issue-error-invalid-verification-code-critical/#post-16032365)
* I’m also seeing a similar issue.
* ```
Fatal error: Uncaught Exception: Invalid characters in the base32 string. in ./com.instacart/wp-content/plugins/wp-2fa/includes/classes/Authenticator/class-authentication.php:291
Stack trace:
#0 ./wp-content/plugins/wp-2fa/includes/classes/Authenticator/class-authentication.php(255): WP2FA\Authenticator\Authentication::base32_decode('\x85\xC8\x14\xA5Y\xD1O\xC19M/5\xE0\xBE\xC1...')
#1 ./wp-content/plugins/wp-2fa/includes/classes/Authenticator/class-authentication.php(234): WP2FA\Authenticator\Authentication::calc_totp('\x85\xC8\x14\xA5y\xD1o\xC19M/5\xE0\xBE\xC1...', 55459830.366667)
#2 ./wp-content/plugins/wp-2fa/includes/classes/Authenticator/class-login.php(903): WP2FA\Authenticator\Authentication::is_valid_authcode('\x85\xC8\x14\xA5y\xD1o\xC19M/5\xE0\xBE\xC1...', '514482')
#3 ./wp-content/plugins/wp-2fa/includes/classes/Authenticator/class-login.php(719): WP2FA\Authenticator\Login::vali in ./wp-content/plugins/wp-2fa/includes/classes/Authenticator/class-authentication.php on line 291
```
* Plugin Contributor [robertabela](https://wordpress.org/support/users/robert681/)
* (@robert681)
* [3 years, 8 months ago](https://wordpress.org/support/topic/big-issue-error-invalid-verification-code-critical/#post-16033373)
* Hello [@pauljmartinez](https://wordpress.org/support/users/pauljmartinez/)
* Thank you for your message and for using our plugin.
* As per the forums’ guidelines, can you please open your own forum thread? Thank
you for your understanding and cooperation.
* We look forward to hearing from you.
Viewing 5 replies - 1 through 5 (of 5 total)
The topic ‘Big issue – ERROR: Invalid verification code + critical’ is closed to
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* 
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## Tags
* [invalid](https://wordpress.org/support/topic-tag/invalid/)
* 8 replies
* 3 participants
* Last reply from: [robertabela](https://wordpress.org/support/users/robert681/)
* Last activity: [3 years, 8 months ago](https://wordpress.org/support/topic/big-issue-error-invalid-verification-code-critical/#post-16033373)
* Status: resolved