It's for smash run lag now , anybody's help?

When I choose smash run mode it lags very much even when I choose the lowest graphics.(Expect for the challenge doors)Can anyone help?
CPU=i5-8265
GPU = Intel(R) UHD Graphics 620
RAM=4.00 GB (3.89 GB usable)
Processors=Intel(R) Core™ i5-8265U @ 1.60GHz 1.80 Ghz

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It’s about lag please refer to processor info provided. And tell if I have low processing unit to run smash run perfectly.