If I remember rightly, Blackberry OS v4 didn't even have full support for HTML4 - let alone HTML5! - so Adapt certainly won't work on OS4.

As for Blackberry OS v10 - I don't see it in the list of supported browsers (which can be found on page 2 of this document: https://community.adaptlearning.org/pluginfile.php/24/mod_forum/attachment/1471/Adapt_Learning_code_level_definitions.pdf)

Which doesn't necessarily mean it won't work, just that we don't support it.

According to statcounter, it's one of the least-used mobile browsers - so I can't see it getting official support any time time soon, I'm afraid.