Amazfit Watch faces

hello,
since i went under stratOS 2 a lot of watchface does not work anymore. there is only a black screen on the watch.
however, I put the files in the 'watchface' folder of the watch.
I am really disgusted because many do not work since this update.
If anyone has a solution ... thanks

Watchface in .wfz format are fully compatible.
Give a link to those that you do not work we will check them.

All the Watchfaces were working on StratOS 1 but some have not worked since I installed version 2.
I think the problem comes from the Rom. How to remove this SratOS and return to the original Rom?

everything is back to normal after installing the original ROM. thanx