Hey, when a customer fail to put the correct login details, an error appear (as it should) say "Invalid login details." My issue is that I can't find it on WPML String Translation. Checked many times, also did Plugin Localization for woocommerce and also checked on admin strings and still couldn't find anything.
Kindly backup and update all WPML plugins to the latest version and share temporary access (WP-Admin and FTP) to a test site where the problem has been replicated, if possible. This will enable me to provide better assistance and determine if any configurations need to be modified.
Please note that it is important to have a backup for security purposes and to prevent any potential data loss. You can use the UpdraftPlus plugin (https://wordpress.org/plugins/updraftplus/) to fulfill your backup requirements.
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✙ To resolve the issue, I may need your consent to deactivate and reactivate plugins and the theme, as well as make configuration changes on the site if necessary. This emphasizes the significance of having a backup.