error: "failed to save" + camera-option does not work

[obacht8]

warping, cropping and preview work really nice, the app aims to provide a nice feature but does not work (least on my phone)

1. open photo from galllery, edit ... result cannot be saved! error-notification: "failed to save"
2. camera-option opens camera and pretends to take photo and that´s it: no photo anywhere

all permissions the app asks for are granted

phone: Samsung S7 SM-G930F with /e/OS 1.11