After update theme slider not working

After update WordPress theme homepage slider not working in the website:
WordPress Version 5.4.1

Please suggest me, what should i do now?
I am new, in this section


Please contact the theme author to get support


How can i contact theme author?

You need to login using the account which purchased the theme - you have no buyer badge on this account. Without this the author will not be able to validate your purchase or help.

OK Thanks
thanks for your quick help