Results 2 issues of Labib Chowdhury

I have facing this error while train from scratch. anyone face this problem or can help to solve this? None optimizers generated epoch 0 started 20%|███████████▊ | 11645/58227 [37:04

self.lr = K.variable(lr, name='lr') AttributeError: can't set attribute keras version - 2.3.1 How to solve this issue?