Dforce Companion Assertion Failure (was working)
DForce Companion has started throwing an error (assertion failure) when I start it (see image). It fails at the point where a scene loads and it is connecting to discover the scene elements. This is a very recent problem - I've been using it for years.
I'm on the most recent 4.24 Studio and I've removed and reinstalled the Companion sofware using DIM.

Comments
Do you have any Bone Minions on the figures in your Scene ? If you do, you'll get this error when you activate dForce Companion pane. It comes from the conflict in between Bone Minion and dForce Companion if the option Show Only Figures (nodes with rigging) is checked in dFormce Companion pane.
Solutions: 1) Uncheck the option Show Only Figures (nodes with rigging) ; 2) Click Ignore button twice to let the message go. It'll bring no other issue to you. DO NOT click Abort, it'll make Daz Studio crash.
Edit: I ever reported this issue to ManFridays and RiverSoftArt (the authors).... no fix so far ~~
No, I have never used Bone Minions. Thanks for the advice however.
Well, you still can try unchecking Show Only Figures (nodes with rigging), see if the error's gone when activating dForce Companion pane. If the error is gone, more likely there might be a figure like Bone Minion in your Scene pane... you can check in there.
If the error is still there, I suppose the culprit might come from another plugin. Then you may do a trouble-shooting by using exclusive method, deactivate all plugins then test by activating them one by one.