Sigma DG Lens Compatibility with EOS R10

[nowstanding]

I found a Sigma DG 28-300 in my storage recently, it's great because it combines both my 200mm and 20mm in one. 

So, I have already got an adapter for my Cannon EOS R10 which I am using at the moment to shoot with (NIK-F to RF adapter) the Sigma DG lens fits and attaches however it does not seem to be making the connection with the camera. When I click to take a photo or video it does not want to which is why I am inquiring. When I attach this to my Cannon EOS 650D it has no problems but I would really like it to work with my R10. 

Is this a problem with the adapter or something else? 

I would deeply appreciate any insight into this situation of mine. 

All the best.

[nowstanding]

I have seen that in a cameras setting you can enable "shoot without lens attached" Does anyone think this could resolve the issue?

[Tronhard]

Using stacked adapters is always going to be problematic and this is a question that really should be addressed to Sigma.  Canon do not offer support for third-party lenses, particularly ones that are provided with a lens mount for a completely different brand of camera system.  Sigma can re-mount their lenses with a different brand mount, and that might be worth pursuing.