offline maps don't work on iphone

HI,

since new version offline maps do not work. I have valid navigation pack, have successful downloaded maps, but clicking button "show map" i see only empty squares, the same appears selecting offline maps by clicking on the globe.What is going wrong?

Any help will be apprecited.

I didn't find the right solution from the Internet.

References:

https://pt.wikiloc.com/forum/viewtopic.php?f=38&t=9096

eLearning Solution Example

Thank you.