"Error in assignID: item with name 'fusion-reactor-equipment' does not exist.
Source: personal-tesseract-1 (recipe)."
This error is output and the item cannot be used.

Same

It has a Space Age dependency even though it's not listed as having one. I looked at the lua and fusion reactor is a pre-req for the technology and that was introduced in Space Age...

The old version (before 2.0) also had this prerequirement, and it worked fine. If you want to make it work, simply remove the prereq values from the config.lua in the mod's folder.

According to the Wiki, it became a Space Exploration exclusive feature in 2.0.7.

Yeah, I figured it would still have some problems.
Also During some testing, I think I also had an issue with transferring power between a space platform at a planet surface. (I'll probably add an additional disclaimer to say its potentially broken)

Fixing this one is easy. For Personal Tesseract 2-4, it checks if the prerequisits exists, otherwise the item is disabled. It just needs to do the same for the level 1 tesseract for a quick fix.

I'm playing Space Exploration, and the Tesseracts work fine, except for moving spaceships, but that's another can of worms.