The Yellow banner at the top of the Plugin manager page reads
Please do not install REST API related plugins until you have confirmed that your installation of Jomres is able to run them. To do that, please visit the Admin > Jomres > Tools > REST API test page. This includes any of the "Channelmanagement" plugins.
However, there is not Admin > Jomres > Tools > REST API test page option in the Admin > Jomres > Tools > menu
Joomla! 3.9.22 Jomres 9.23.6
The Yellow banner at the top of the Plugin manager page reads
Please do not install REST API related plugins until you have confirmed that your installation of Jomres is able to run them. To do that, please visit the Admin > Jomres > Tools > REST API test page. This includes any of the "Channelmanagement" plugins.
However, there is not Admin > Jomres > Tools > REST API test page option in the Admin > Jomres > Tools > menu