"Unexpected Platform Error" on Masteries Pages

AROB IS HOT·11/11/2015, 8:52:53 PM·8 votes·12,855 views

I'm running the Mac client and since the 5.22 patch this morning I'm unable to edit or create new mastery pages. Every time I try I get the client error "Unexpected Platform Error". The changes I make to the mastery pages seem to save, but when I try to use them in game it shows I have no masteries, and when I go back to my masteries page after the game, it shows the page I edited earlier as blank.

This is incredibly frustrating and means I can't compete in lane at all. Essentially making the game unplayable until it's fixed.

If someone could please help me out with this I would be highly appreciative.

12 Comments

AROB IS HOT11/11/2015, 9:01:01 PM5 votes

Read another similar thread and the problem seems to be caused by having the same name for two mastery pages. Deleting the page with the same name seems to have fixed this.

SpadedDuce11/12/2015, 12:17:32 AM1 votes

Had the same problem on windows, deleting all my mastery pages solved it.

drakonteios11/13/2015, 3:39:20 PM1 votes

Same here.

Joan1212122/8/2016, 7:33:02 PM1 votes

I have problem with my masteries pages. When I try to run some of my pages, It get written something like "Unexpected problem check out the forums or support pages" and ????

pety6823/5/2016, 9:39:37 AM1 votes

omg my masteries errored pls help me

Míd Or Feed3/14/2016, 11:25:58 PM1 votes

I have this glitch too, followed by ping spikes of 250 for a few min. I live in chicago and great internet so it is not my fault.

A Cheeky Fox3/17/2016, 7:55:55 AM1 votes

my keystone is missing in game, even i picked it summoner 14

Ðevils11/13/2016, 1:27:22 PM1 votes

Im getting this Error code when i pick my masteries it give me this Error when i get in game i dont have any masteries on please fix

Doktor Kelava7/15/2016, 12:09:39 PM

Agreed, same thing happens to me all the time and I HATE IT !