Glad to know that a manual install fixed the issue!
Not sure how it can get to that point without installing specklepy. I guess there’s some hole in our logic we need to patch!
One quick advice, i think the latest QGIS version hasn’t yet been updated to the latest specklepy version, so make sure you install the one it’s expecting: 2.6.4.
If you just did pip install specklepy you may have gotten the latest 2.7.4 which I’m not sure but it may have breaking changes.
We’ll update it for our latest release, but if you want to keep up with the latest updates, cloning our repo into your plugins folder is a good way to go that way you could pull any urgent fixes before a “stable release” is approved by the QGIS marketplace (which usually takes a couple days at least)
It will allow you to press send without a layer selected. The layers list shows the available layers. It isn’t clear but you do need to select them in the list.