Reactions disapear and break script

Hi,

I’ve had this issue a couple of times where after modifying Reactions in a Mode the Reactions would disapear, and when I install the script I would get the following error:
“add_reactions error. reaction listener not set for Reaction 4”

Also I’m using version 2.5.2 and I can’t import files getting this error: “not json files”.

So far I haven’t been able to finish a script without either the controller or the script disapearing, making the whole think a bit frustrating.

Thanks!