Sleight of hand bug where I enter Gray Hammer Mine and can gather the first 2 journals but after defeating the boss i can not gather the last three. Ive walked to the correct spots for the journals but there is no interact popup. Right after opening the doors to the main bos I get “error code 140005”. Has happened three times now 
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Also happened to me. Glad to hear it’s not just me experiencing this issue. This happens when I try to run Gray Hammer Mine on both normal and hard. Hopefully this issue gets fixed soon!
The error is not related to hidden story. Hidden story is timed event - check the timer which appears after you read the entry (above health bar).