Hi, I saw this mod and thought i'd give it a go on my dedicated server. Unfortunately it gets an error on starting the server...
3.027 Applying migration: Portal Research: portal-research_0.1.1.lua
3.033 Applying migration: Portal Research: portal-research_0.3.0.lua
3.056 Applying migration: Portal Research: portal-research_0.4.0.lua
3.078 Applying migration: Portal Research: portal-research_0.4.1.lua
3.107 Loading script.dat: 190 bytes.
3.109 Checksum for script /opt/factorio/temp/currently-playing/control.lua: 282129324
3.116 Checksum for script portal-research/control.lua: 3571450234
3.412 Error ServerMultiplayerManager.cpp:94: MultiplayerManager failed: "Error while running on_configuration_changed: Gui element with name portal-research-button already present in the parent element.
stack traceback:
portal-research/modules/gui.lua:43: in function 'initForPlayer'
portal-research/control.lua:156: in function <portal-research/control.lua:46>"
3.412 Info ServerMultiplayerManager.cpp:670: mapTick(-1) changing state from(CreatingGame) to(InitializationFailed)
3.413 Info ServerMultiplayerManager.cpp:140: Quitting multiplayer connection.
3.413 Info ServerMultiplayerManager.cpp:670: mapTick(-1) changing state from(InitializationFailed) to(Closed)
3.428 Goodbye

Actually upon double checking, it crashes if I try to load it up in single player with the same error. Version 0.15.21

Fixed in 0.5.2 :)

Well I fixed it with workarounds but it turned out this was a bug in Factorio itself that caused problems for loads of mods :)