[Crash on loading world. (Reinforced Iron Chest)]

It first started out when I tried building a Reinforced Iron Chest, part of Improved Storage. After attempting to open the chest (to compare its storage capacity against that of a regular chest) the game closed completely to the launcher. The game now crashes completely when trying to re-enter. 

(standing nearby / same chunk as the chest, but it did not crash when first placing the chest, and now it crashes immediately when the world loads?)
 

LOG:
[All previous messages seem pretty much the same an not much use at all, they are just a list of the name of every mod in the pack.]

[B#347] 2017/01/10 17:08:02 [INFO]  2017-01-10 17:08:02 [INFO] [STDOUT] 	TConstruct Environment: Environment seems clean, however you are using a modpack; please report it to the pack author, not us!
[B#347] 2017/01/10 17:08:02 [INFO]  2017-01-10 17:08:02 [INFO] [STDOUT] 	Profiler Position: N/A (disabled)
[B#347] 2017/01/10 17:08:02 [INFO]  2017-01-10 17:08:02 [INFO] [STDOUT] 	Vec3 Pool Size: 1321 (73976 bytes; 0 MB) allocated, 499 (27944 bytes; 0 MB) used
[B#347] 2017/01/10 17:08:02 [INFO]  2017-01-10 17:08:02 [INFO] [STDOUT] 	Player Count: 1 / 8; [GCCorePlayerMP['coconut219'/413, l='Coop [1,6,4]', x=346.25, y=66.63, z=246.01]]
[B#347] 2017/01/10 17:08:02 [INFO]  2017-01-10 17:08:02 [INFO] [STDOUT] 	Type: Integrated Server (map_client.txt)
[B#347] 2017/01/10 17:08:02 [INFO]  2017-01-10 17:08:02 [INFO] [STDOUT] 	Is Modded: Definitely; Client brand changed to 'fml,forge'
[B#347] 2017/01/10 17:08:02 [INFO]  2017-01-10 17:08:02 [INFO] [STDOUT] #@!@# Game crashed! Crash report saved to: #@!@# C:\Users\Alex\AppData\Roaming\.technic\modpacks\attack-of-the-bteam\crash-reports\crash-2017-01-10_17.07.57-server.txt
[B#347] 2017/01/10 17:08:03 [INFO]  AL lib: (EE) alc_cleanup: 1 device not closed

If there is something else important hidden close to the top of the log that isn't just the launcher starting try to explain what it is and I will be able to find it for ya.

[[Suggestion] Add clarification that minecraft login is Email address, not username.]

This is probably never going to be read ever, but 
When you log into Technic Launcher the screen asks for a name and password, however some people might wrongly assume this is asking for their username.
Simply put, I think the header should be changed to something like 'email address' or have it written in parenthesis in order to make the UI clearer.