Has this happened yet? https://cmsmasters.net/support/ this link used to bring me to a page where there was info regarding this matter, but it now just takes me to a contact form. Does anyone know if the themes have been updated as of yet so we can update Wordpress to the newest version?
Contact with your purchase item author hope they will helped!
Contact theme author and ask them about compatibility is the best option.
Also you can check the theme page Changelog and last Updated date to know about the current version. Also check in the right side Compatibility with the wordpress version.