Bugsplat upon entering info and then logging in

I tried to log into League today and upon putting my username and password in, and then hitting login, I am met with a bugsplat.

Upon looking at the logs, the crashes all are centered around 1 thing: championMastery.getAllChampionMasteries

Below is the excerpt for when the crash occurred:

000542.981| ALWAYS| Queued Dradis event to be sent. 000543.028| ERROR| Crash Occurred 000543.074| ALWAYS| lol-collections| lol-collections: Preparing service proxy request: championMastery.getAllChampionMasteries 000543.074| ERROR| Remoting| HTTP Response 500 to GET '/lol-collections/v1/inventories/30341490/mastery-book' 000543.119| ALWAYS| recofriender| recofriender: HTTP[Outbound]: GET https://recofriender.leagueoflegends.com/v1/contacts/NA1/44605818 000543.164| ALWAYS| lol-collections| lol-collections: Started service proxy request: championMastery.getAllChampionMasteries (da488adb-2fd2-4247-8c4e-25dc021a0478)

I'm assuming that my client cannot successfully grab the champion masteries that were changed in the new patch? I have tried reinstalling, running on admin, etc. but to no success. Anyone else having this problem?