1. The following text appears on all pages when the 2 plugins are active.
Notice: Undefined variable: tr in PATH\wp-content\plugins\wpml-string-translation\inc\functions.php on line 2159
2. on Yoast WordPress SEO: Titles admin page, Post and Page Title templates are not saved. They are stuck on previous values.
Deactivating Yoast SEO makes the notices go away.