No touchbar / restarting after error

On a Macbook Pro (2019) with BigSur 11.5.2. the touchbar doesn't work anymore. The macbook is also restarting several time after the following error code

"panic(cpu 1 caller 0xfffffff014e73f24): "Halt/Restart Timed Out"

Debugger message: panic

Memory ID: 0x6

OS release type: User

OS version: 18P4759a

macOS version: Not set

Kernel version: Darwin Kernel Version 20.6.0: Tue Jun 22 21:55:04 PDT 2021; root:xnu-7195.141.2~1/RELEASE_ARM64_T8010

Kernel UUID: E6B23446-BF1C-3A39-9311-EDEAEB220BF9

iBoot version: iBoot-6723.140.2

secure boot?: YES

x86 EFI Boot State: 0x15

x86 System State: 0x3

x86 Power State: 0x6

x86 Shutdown Cause: 0x7

x86 Previous Power Transitions: 0x60400040506

PCIeUp link state: 0x16892700

Paniclog version: 13

Kernel slide: 0x000000000d0e8000

Kernel text base: 0xfffffff0140ec000

mach_absolute_time: 0x101574aa8

Epoch Time: sec usec

Boot : 0x61165279 0x00036546

Sleep : 0x00000000 0x00000000

Wake : 0x00000000 0x00000000

Calendar: 0x61165323 0x000cb063

CORE 0: PC=0xfffffff014868080, LR=0xfffffff01486806c, FP=0xffffffe8041a3ee0

CORE 1 is the one that panicked. Check the full backtrace for details.

Panicked task 0xffffffe199f54630: 3009 pages, 213 threads: pid 0: kernel_task

Panicked thread: 0xffffffe19a61b200, backtrace: 0xffffffe810e0b860, tid: 1259

lr: 0xfffffff01483b4f0 fp: 0xffffffe810e0b8b0

lr: 0xfffffff01483b348 fp: 0xffffffe810e0b920

lr: 0xfffffff014966d90 fp: 0xffffffe810e0b9f0

lr: 0xfffffff014e615fc fp: 0xffffffe810e0ba00

lr: 0xfffffff01483b07c fp: 0xffffffe810e0bd80

lr: 0xfffffff01483b07c fp: 0xffffffe810e0bde0

lr: 0xfffffff01586b1c4 fp: 0xffffffe810e0be00

lr: 0xfffffff014e73f24 fp: 0xffffffe810e0be10

lr: 0xfffffff014888bdc fp: 0xffffffe810e0bf00

lr: 0xfffffff014e6c5a0 fp: 0x0000000000000000"

What does this mean and what is a solution?