Instant Crashes After Updating to Patch 3.56

After updating the game and proceeding with the quest-line, I crashed immediately after turning in a quest at Gridania.

Since then, I've been trying to re-log back in but would instead get a fatal crash error anytime I do so.

I went into Reliability Monitor and was presented with this.

Description
Faulting Application Path: D:\Program Files (x86)\SquareEnix\FINAL FANTASY XIV - A Realm Reborn\game\ffxiv.exe

Problem signature
Problem Event Name: APPCRASH
Application Name: ffxiv.exe
Application Version: 1.0.0.0
Application Timestamp: 58d2c86f
Fault Module Name: StackHash_3ee0
Fault Module Version: 10.0.14393.479
Fault Module Timestamp: 58256ca0
Exception Code: c0000374
Exception Offset: PCH_DF_FROM_ntdll+0x0006EB8C
OS Version: 10.0.14393.2.0.0.768.101
Locale ID: 1033
Additional Information 1: 3ee0
Additional Information 2: 3ee0fa548f93e318f161f7068a26589d
Additional Information 3: 14ff
Additional Information 4: 14ff4d154abdcd51739f9285c7842579

Extra information about the problem
Bucket ID: fa175a76cf4e12b9f910695d7ad53796 (108820999679)