One ui gone after software update

[mc_chimken]

I am now using a custom launcher some how after I updated the phone it just kept saying phone is starting... it was taking to long to finish. Fortunately the search thing in the control center worked so I could search the apps. I went to settings just to see that my one ui is gone after this software update. Kindly check this out. and please fix this. A37 

[mc_chimken]

Fixed it

[mc_chimken]

Just had to disable power mode

[mc_chimken]

Like are u serious

[mc_chimken]

Am never turning it on before I update

[Zain2000]

Please avoid using 3rd party launcher if you want to experience the true and hassle free samsung experience.

[Vinay gangula]

Sumsang m01 core erorr in application