Crash "StoreProhibited" when calling "lv_set_today_date" or the show_date function from LVGL 8.3

Im having a little Problem here. i got a ESP32-S3 with 16MB Flash and 8MB PSRAM (I dont use the Ram its slower).

i got everything running but when i try to call “lv_set_today_date” i get a Crash on lv_calendar.c line 89.
( calendar->today.year )

Error Message:

Blockquote [ 853][I][esp32-hal-i2c.c:75] i2cInit(): Initialising I2C Mast[ 3474][V]
Guru Meditation Error: Core 0 panic’ed (StoreProhibited). Exception was unhandled.
Core 0 register dump:
PC : 0x420349f1 PS : 0x00060130 A0 : 0x8201a745 A1 : 0x3fcc9e10
A2 : 0x00000000 A3 : 0x000007e7 A4 : 0x00000009 A5 : 0x00000006
A6 : 0x00000000 A7 : 0x00000003 A8 : 0x820561ac A9 : 0x3fcc9df0
A10 : 0x00000000 A11 : 0x6a423272 A12 : 0x6a423272 A13 : 0x3fc9ece8
A14 : 0x00ff0000 A15 : 0xff000000 SAR : 0x00000015 EXCCAUSE: 0x0000001d
EXCVADDR: 0x00000028 LBEG : 0x400570e8 LEND : 0x400570f3 LCOUNT : 0xffffffff
Backtrace: 0x420349ee:0x3fcc9e10 0x4201a742:0x3fcc9e30
ELF file SHA256: 6ec4e3844fbb6f65