That pop-up you are seeing is the newly released Terms of Use for Leafly.com. In order to access anything past this point such as strain details and dispensary locations, etc. you simply need to check the light grey box to the left of 'I am at least 21 years old or a valid medical marijuana patient and agree to the Terms of Use'.  

This is required federally for any cannabis industry business due to the current Schedule 1 classification of cannabis which supersedes that of your states medical or recreational regulations.