I have installed Voparis V3 - hence referred to as V3 and StarTube, two userscripts that work together to restore old YouTube designs. But installing these two userscripts makes it so that the button to create a segment submission is no longer visible.
Below is a comparison, showing first that the button comes up when V3 and StarTube aren't installed.
Now, when these are installed.
Someone already created an issue on StarTube github, but the creator mentioned that this was not under his control.
Please see if this can be fixed. Would love to keep contributing to sponsorblock, but I can't tolerate YouTube's toddler UI without the userscripts.