• Modpack: Mystical Skies v1.5.1
• RandomPortals Version: randomportals-1.12.2-1.7.0.1
• Spongeforge Version: spongeforge-1.12.2-2768-7.1.5-RC3515
• Log File: https://pastebin.com/DFZEg2Lh
(not sure where it starts, or where it ends)

It indicates the Issue being here on line 50:
https://github.com/TheRandomLabs/RandomPortals/blob/1.12.2/src/main/java/com/therandomlabs/randomportals/handler/NetherPortalActivationHandler.java

I feel the Event is triggering continously even when nobody is around. I'm not sure if this is a side effect, but Events requiring Right Clicks (Eating Food, Opening Books) will only work when facing Blocks.

Can you take RandomPortals out and see if the error still occurs? If so, can I have a full log?

We Updated to latest Modpack Version but it still happens:
• Modpack: Mystical Skies v1.6.2
• RandomPortals Version: randomportals-1.12.2-1.7.0.1

I started the server, joined, unvanished, took a Lexica Botania and opened it a few times, then went to restart.

2019-04-16-6.log

edit:
The Issue is solved if RandomPortals is disabled and returns when enabled again.

Thanks for the full log. This is fixed in the next release, although it is strange that RightClickBlock would be called like that.