hygron, hi and welcome to TinyPortal support.
Ok the reason being the current version isn't compatible with SMF 2.0.7. Is this a fresh install of SMF 2.0.7? Or a upgraded version.
Reason I ask is, if you have just patched SMF to from 2.0.6 to 2.0.7 then you can simply uninstall the patch, and then install TinyPortal, then reinstall the patch.
Or make the manual file edit as described in the test failed when you tried to install it. If none of those solutions work for you, I'm afraid you'll have to wait until the new version of TP is released, we are testing this as I type.