Guys, i've redownloaded both twrp and adb/fastboot and it worked.
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PS C:\Users\Moshulika> adb devices -l
* daemon not running; starting now at tcp:5037
* daemon started successfully
List of devices attached
45ba5fe device product:vili_global model:2107113SG device:vili transport_id:1
PS C:\Users\Moshulika> adb version
Android Debug Bridge version 1.0.41
Version 34.0.1-9979309
Installed as C:\adb\adb.exe
Running on Windows 10.0.22621
PS C:\Users\Moshulika> adb reboot bootloader
PS C:\Users\Moshulika> fastboot devices
45ba5fe fastboot
PS C:\Users\Moshulika> fastboot boot c:\adb\twrp.img
Sending 'boot.img' (196608 KB) OKAY [ 4.547s]
Booting OKAY [ 0.170s]
Finished. Total time: 4.805s
PS C:\Users\Moshulika>