Yea, exatly.
It has no bonus listed on technology screen (so it looks like it gives nothing), and, well, after researching this technology game freeze. I leave it for something about 15m and still freezed. :(

This is odd indeed, maybe it's interfering with some other mods...
The research showing no modifier (bonus) is intended and is a limitation of the mod framework: we can't add new modifiers yet (that's why i must replace all roboports on the map with an upgraded version instead of just fiddling with the numbers of the existing ones)

Anyway, can you please test without any other mod active? And if it works, can you give me a list of mods so i can try to troubleshoot the problem?

Also, which factorio version are you running?

It took a good 30 sec on my game, but then I thought about it, I have 2500 roboports.

Mmmm yeah, with so many ports in the game it must take a very long time to upgrade them all...

I may think about adding a scheduler instead of upgrading them all together... I could queue the upgrade procedure and manage 50-100 ports per tick to prevent the game from freezing...

I'll look into it, I don't think I could make the upgrade process any less demanding tbh