Don't know how to install GPU on Kubuntu and receive errors

[wolly]

My GPU is ATI R5 240

Hi does anyone know how to fix these AMD gpu errors in Kubuntu?

https://imgur.com/a/316eKci
https://imgur.com/a/cDdcGrR
i also have some missing firmware and I don't know how to install them on Kubuntu
update-initramfs: Generating /boot/initrd.img-6.5.0-35-generic
W: Possible missing firmware /lib/firmware/amdgpu/ip_discovery.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/vega10_cap.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/sienna_cichlid_cap.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi12_cap.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/psp_13_0_6_ta.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/psp_13_0_6_sos.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/aldebaran_cap.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/aldebaran_sjt_mec2.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/aldebaran_sjt_mec.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/gc_9_4_3_rlc.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/gc_9_4_3_mec.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/gc_11_0_0_toc.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/sdma_4_4_2.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/sienna_cichlid_mes1.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/sienna_cichlid_mes.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/navi10_mes.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/gc_11_0_3_mes.bin for module amdgpu
W: Possible missing firmware /lib/firmware/amdgpu/vcn_4_0_3.bin for module amdgpu

Can someone help me?
Is someone an expert?