Can't resize partition

[Jose96]

I’m using kde partition manager to extend my manjaro partition after shredding the one with Ubuntu but I get this error.

Grow partition ‘/dev/nvme0n1p8’ from 91,49 GiB to 231,16 GiB 
Job: Set geometry of partition ‘/dev/nvme0n1p8’: Start sector: 458.043.392, length: 484.775.936 
Command: sfdisk --force /dev/nvme0n1 -N 8 
Set geometry of partition ‘/dev/nvme0n1p8’: Start sector: 458.043.392, length: 484.775.936: Success

Job: Resize file system on partition ‘/dev/nvme0n1p8’ to 484.775.936 sectors 
Resizing file system from 191.873.024 to 484.775.936 sectors. 

Command: resize2fs /dev/nvme0n1p8 484775936s 
Resize file system on partition ‘/dev/nvme0n1p8’ to 484.775.936 sectors: Error

Resize/move failed: Could not resize the file system on partition ‘/dev/nvme0n1p8’ 

Job: Set geometry of partition ‘/dev/nvme0n1p8’: Start sector: 458.043.392, length: 191.873.024 
Command: sfdisk --force /dev/nvme0n1 -N 8 
Set geometry of partition ‘/dev/nvme0n1p8’: Start sector: 458.043.392, length: 191.873.024: Success

Resizing/moving partition ‘/dev/nvme0n1p8’ failed. 
Grow partition ‘/dev/nvme0n1p8’ from 91,49 GiB to 231,16 GiB: Error

[Aragorn]

You’re not doing this from within the installed system, are you?

[Jose96]

Yes I’m doing it from the partition I’m using now (manjaro one).
Is it not correct?

[Aragorn]

No, it’s not. You should be doing it from the live USB/DVD.

[Jose96]

Done, thank u.