Symptoms
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Unable to update WordPress via WP Toolkit when the instance language is not English, for example, Lithuanian:
Failed to update selected items.
Error: Atsisiuntimas nepavyko.
Updating to version 5.9 (lt_LT)...
Atnaujinimas siunčiamas iš https://lt.wordpress.org/wordpress-5.9-lt_LT.zip... -
The URL in the error message shows "Release not found."
Cause
Product issues:
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#EXTWPTOOLK-8641 "Certain localized WordPress installations can now be properly updated via WP Toolkit."
Fixed in:- WP Toolkit 5.10.0 17 March 2022
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#EXTWPTOOLK-8623 "You can now update your localized WordPress insallation to the latest version of WordPress even if it’s not available in the current WordPress installation language."
Fixed in:- WP Toolkit 5.10.0 17 March 2022
Resolution
Please consider updating your server:
Workaround
If update is not possible for some reason you may try the following
workaround
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Navigate to WordPress > example.com > Setup and change the language to English.
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Update the instance.
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Change the language back.
Alternatively, ignore the error and wait until the wordpress.org will publish the update for the core/plugins/themes/