It looks like you are trying to use the lightbox_note_for_net plugin. I have actually done some work updating the plugin. Here is a beta version of the updated plugin. Try it out and let me know if you find issues.
This Beta version works very well with CPG1.6x, the plugin settings have quite a few interesting options.
One question though; Why limit the number of files to display to 1-50? With the previous version there was no such limit, it directly took the number of files of the album that was being displayed, Value 0 (attached screenshot):
It also happens that, when I'm in lastup, and I start the LightBox on the first image, the Light Box doesn't work (it only opens the JPG, directly). Instead, it does work when I have "Add new Button" active in the menu. But, if I have "No button change" selected, the LightBox doesn't work for the first lastup image (but it does work for the others, 1-49)
I think it could be solved if the value 0 was possible to show the whole album.
It also happens that, when I'm in lastup, and I start the LightBox on the first image, the Light Box doesn't work (it only opens the JPG, directly). Instead, it does work when I have "Add new Button" active in the menu. But, if I have "No button change" selected, the LightBox doesn't work for the first image in lastup (but it does work for the others, 1-49).
I think it could be solved if the value 0 was possible to show the whole album.
Great job!