Glowing Laser beams has been working fine until the 1.2.0 update of Krastorio. Here's the message that was presented in the logs.

  36.912 Mods to disable:Failed to load mods: Error while loading entity prototype "laser-turret" (electric-turret): Key "type" not found in property tree at ROOT.electric-turret.laser-turret.attack_parameters.ammo_type.action
Modifications: Base mod › Glowing Laser beams › Krastorio

Mods to be disabled:
• laser_fix
• Krastorio

This has been x-posted to Krastorio as well.

Link to Krastorio for convenience: https://mods.factorio.com/mod/Krastorio/discussion/5d13961f94df66000cc50cb1

ok its fixed again.. we'll see for how long^^