This is a sister of MDL-67935, where the same type of errors (unable to login/logout) were fixed within some badges scenarios.

Maybe the solution is similar.

Basically the same error, but in scenarios like (please add more if found):

• Changing preconfigured tool selection
• Editing a manually configured external tool
• Editing a tool's settings that was configured from a preconfigured tool that supports Content-Item
• Editing a tool's settings that was configured from a preconfigured tool that supports Deep Linking
• Tool that supports Deep Linking should be able to configure a tool via the Select content button
• ...

Example links (require login):

• https://ci.moodle.org/job/S.03.04%20-%20Behat%20-%20Chrome%20+%20MSSQL/641/
• https://ci.moodle.org/job/S.03.02%20-%20Behat%20-%20Chrome%20+%20MySQL/574/
• ...

Example output:

001 Scenario: Changing preconfigured tool selection # /var/www/html/mod/lti/tests/behat/contentitem.feature:52

      Given I log in as "admin"                     # /var/www/html/mod/lti/tests/behat/contentitem.feature:53

        Field matching locator "Username" not found. (Behat\Mink\Exception\ElementNotFoundException)