Modpack version
1.60

Can the issue be reproduced?
Yes

Logs

https://pastebin.com/izuJ4AVb
https://pastebin.com/4FK4Wdt4

Issue
When I have the Flux network set to wireless charge items in my inventory and I try and pick up a Dimensional Receiver that has the Octadic capacitor installed it crashes the game with the above errors. Basically it looks like the wireless charging is not supported on the enderIO dimensional receivers and when it tries to "cast" it on the block it hangs and eventually crashes out and you have to then remove that item from your bags or restore from world backup.

If this is a feature request, feel free to delete the template.

Yikes, I'll get this reported, thank you :)

After some further testing it appears that just placing the block in the world and then trying to either break the item with a pickaxe or with a wrench, it crashes out as well, pretty much same exact error as well.

Hmm, okay. May I have that report as well please?

Sure.
https://pastebin.com/LKuSiU9Q

Pastebin

Enigmatic2_expert_enderio_crash3 - Pastebin.com

Does the crash happen if you disable your Flux Network's wireless charging?

Yes, it does keep happening, even with all charging disabled in the base. So I think my initial assumption with FN being part of the issue is probably wrong. Sorry about that. I thought it was part of the issue because it charged the item on my bar once and then froze up. I have also tried removing Optifine, just in case it was part of the issue and it still as the same issue regardless.
Let me know if there is anything else you want me to try out.

So just did some more digging on the interwebs and found this: SleepyTrousers/EnderIO-1.5-1.12#5086
Looks like the same exact issue and it actually has to do with Botania and the magnetic ring. So there is a fix here: VazkiiMods/Botania@1701732

I have the exact same issue but without wireless charging of Flux Network. But I have a Thermal Battery in my inventory which is charing all items of my inventory, maybe this is causing the same issue.

The game crashed whilst ticking player
Error: java.lang.ClassCastException: net.minecraft.item.ItemAir cannot be cast to crazypants.enderio.base.power.forge.item.IInternalPoweredItem

I broke the EnderIO Simple SAG Mill and during the brake animation the game crashed.
Now my game is broken and I am not able to play anymore :(

EDIT: I will try to manually edit the botania files as described in the link above.
EDIT²: Ok seems impossible for me because of course there are only the compiled .jar files of Botania and I don't know how to decompile and change something.

Seems that I have to wait till a fix in the modpack will be released

So the issue is with the Ring of Magnetism from botania, just confirmed that in the game. If you remove your magnet ring and then break the block it works and lets you pick it up with no issues.

So the issue is with the Ring of Magnetism from botania, just confirmed that in the game. If you remove your magnet ring and then break the block it works and lets you pick it up with no issues.

hmm I also had the ring of magnetism put on. But how to fix it now? I am not able to login anymore, so I can't put off the ring.

If you are playing single player, then the game should have been auto backing up the world save and you can just restore the world back to before your issue. For MP, I think you can reset your character inventory, or maybe the server admin has to do that, can't remember, been a while since I did a MP server admin.

I realize that this issue has already been closed, but after encountering this yesterday myself, I found a mitigation for anyone whose world is corrupted by this pending a new full release.

In the Mod Config for Botania, there's an option to "Invert Magnet Ring Function", or something like that. In the botania.cfg file, it's "B:magnetRing.invert". Basically, it changes the functionality of the ring so that it only magnets while you are crouching, instead of the default behavior of disabling magneting while crouching. If you change that setting from false to true, it will allow you to load the world again.

The crash itself seems to happen when the ring starts to magnet an item. That does mean that you'd instead crash when you crouch though and the magnet turns on to try and suck up the item.