Hey there!
I believe some of the errors folks here have experienced with Oasis (the Colibri builder and other errors) are because for some reason, WordPress thinks your Oasis is the same as an Oasis in their theme repository, so it tries to let folks know there’s an update, the same as they do with Twenty Twenty-three and the other default themes.
See https://wordpress.org/themes/oasis/ for more details. Why WordPress thinks this Oasis is yours is beyond me.
Also, is there a way to get Oasis to use content-sidebar for single posts? I thought I added the snippets correctly, but Oasis continues to mock me…. 馃檪