Dear @Rama94
Apologies for the late reply, If i'm not mistaken ( forgive me if i am )
This is an issue regarding your web server and is likely not an issue of Lay Theme itself, and setting that can be changed within your webhost.
https://wordpress.org/support/topic/mismatched-post_max_size-and-upload_max_filesize-values/
However do let me know!
Best Wishes
Richard