Can open launcher only with morphing clock

Ok, I installed pixel clock, and suddenly the 3 btns didn't work. So it was visualized the morphing clock and I couln'd load the pixel clock (first time). So I connected to Espruino web ide, and it appeared (without pressing any button) this:

Uncaught Error: Unknown UI mode
 at line 31 col 38
    throw new Error("Unknown UI mode");
                                     ^
in function called from line 26 col 21
Bangle.setUI("clock");

After this, I could press the buttons and use the pixel clock. Anb again the problem of pressing the btns. Moreover when I use the pixel clock the battery icon disappers.