Mana Khemia: Alchemists of Al-Revis Q&A

I want to ask you all can you all load ?
When i already visit all the places with jess i can save at the workshop right after that the next day i tried to load it said save file corrupted...
so if someone has the same expirience as i do please tell me how to...

how do you find the ten secret places in the old school?

where do you find Brownie hat in the game?

how to find puni gummi?