Please take a look here:
https://www.mobileread.com/forums/sho...69#post1924169
But also this post:
https://www.mobileread.com/forums/sho...&postcount=275
=> I didn't get further (and as I put off my device each evening, and put on each morning, it would be always removed - so I stopped installing it each time)
[I experienced several some problems when not rebooting the device for several days, so I just put it off at the moment each evening)