Fix 500 errors

https://dimini.tk/en/statistics/games/hearthstone/crafting-guide/ and https://dimini.tk/en/statistics/games/hearthstone/arena-tier-list/

According to the logs looks like the problem is this: https://support.plesk.com/hc/en-us/articles/12388040127383
However I don't think that I can fix it in a way they suggest, so it should probably be done via making datatables ajax-driven