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This thread is resolved. Here is a description of the problem and solution.

Problem:
You are experiencing a fatal error when trying to log in to the admin dashboard, specifically an error related to an unknown format specifier 't' in the WPML String Translation plugin.
Solution:
We are aware of this issue. As a temporary solution, we recommend you refer to our errata page for details on how to address this problem: https://wpml.org/errata/flux-checkout-fatal-error-uncaught-valueerror-unknown-format-specifier-t/.
This issue is expected to be resolved in an upcoming release.

If this solution does not apply to your case, or if it seems outdated, please open a new support ticket. We also highly recommend checking related known issues at https://wpml.org/known-issues/, verifying the version of the permanent fix, and confirming that you have installed the latest versions of themes and plugins. For further assistance, you can contact us directly through our support forum at https://wpml.org/forums/forum/english-support/.

This is the technical support forum for WPML - the multilingual WordPress plugin.

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Last updated by Andrey 2 months, 1 week ago.

Assisted by: Andrey.

Author Posts
April 10, 2025 at 3:30 pm #16919608

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Background of the issue:
I am trying to log in to the admin dashboard but encounter a fatal error. The issue can be seen at the following link: hidden link

Symptoms:
Fatal error: Uncaught ValueError: Unknown format specifier "t" in /var/www/html/wp-content/plugins/wpml-string-translation/classes/translations-file-scan/wpml-st-translations-file-registration.php:100

Questions:
How can I resolve the fatal error when trying to access the admin dashboard?

April 10, 2025 at 5:46 pm #16920152

Andrey
WPML Supporter since 06/2013

Languages: English (English ) Russian (Русский )

Timezone: Europe/Kyiv (GMT+03:00)

Thank you for contacting WPML support.

Our development team is aware of this issue. As a temporary solution, please refer to the following link:

https://wpml.org/errata/flux-checkout-fatal-error-uncaught-valueerror-unknown-format-specifier-t/

I hope this matter will be addressed in upcoming releases with any necessary improvements.