Problem: If you're experiencing issues with incorrect canonical URLs in the meta tags of your site when using WPML SEO, such as double encoding in URLs and seeing '%%' characters, this might be due to an outdated version of Yoast Premium. Solution: We recommend updating Yoast Premium to the latest version. This update should resolve the issue with the canonical URLs displaying incorrectly. If this solution does not apply to your case because it might be outdated, or if you continue to experience issues, please visit our support forum and open a new support ticket. Additionally, we 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.
