This documentation is not using the current rendering mechanism and is probably outdated. The extension maintainer should switch to the new system. Details on how to use the rendering mechanism can be found here.
Updating to ver. 5.0.0¶
If you are updating from a version < 5.0.0, you must change your custom template-file!
The file Layouts/Default.html was removed because of a major bug in TYPO3 8. It is not possible to use this file even with TYPO3 8.7.10.
Got to your template in file fileadmin-folder and replace this lines:
<f:layout name="Default" /> <f:section name="main">