Receiving  the error "The key sequence "xxx" is ambiguous. Use 'Configure Keyboard Shortcuts"
from the 'Settings' menu to solve the ambiguity. In my case it is "ALT T" in another person on Reddit, it's "Del"

According to the Kdenlive bug tracker, it might be https://bugs.kde.org/show_bug.cgi?id=350008

Here is my testing:
I tested it on “ALT T”, which in some KDE applications, opens the Tools menu.
If I attempt to use ALT T without building a keyboard binding, the “Tools menu” is activated in Kdenlive
When I align ALT T to a Kdenlive function, I received the same ambiguous error after I try to run it. 

Thanks for looking into this