Bump this as well, I believe Nexon stated in their maintenance notes that they are still investigating this issue but just in case.
I'm unable to fight Damien after finishing Heroes of Maple: Act IV today on 6/23/2019
Experiencing this issue as well after the server maintenance (which the update notes said should have been fixed)
Bug type: Unable to enter Cash Shop
Brief bug summary: Whenever I enter the cash shop, my screen goes black and I get sent back t…