Faced a similar problem, but on Linksys EA7300. In my network Tp-link as an access point. Last time I added a new wifi point and everything worked. Today it stopped again. Is it possible that this is a problem somewhere in the software?
Usually this is a configuration issue, but sometimes bugs do creep in.
@Hromodeus please start a new thread - we will review the configs and see if there are any errors we can help resolve.
Okey, here link: