Mobile Printing & Cloud Printing

I have not had any issues since I purchased my printer the first week of October 2017. I only use the direct wifi access option only. The printer is NOT connected to an outside wireless network. It is NOT connected to LAN, or VPN. I use is solely off of my Samsung cell and tablet with its direct wifi signal. Literally out of no where 3 days ago I tried to print and all of a sudden my tablet was telling me the prunter was not availible. I checked everything I can think of the past 3 days. The password is the same. But it won't accept it in the HP app when I enter it. I also recieved a connection message that said there was a problem with the ip address (I don't know the actually message) and I know nothing about where to even start troubleshooting in that department on my own. There have not been any error messages on the printer. It also was saying it was connected to my tablet 3 days ago when is issue first arose. Niw it doesn't even say that anymore. I'm sure this is some simple fix. I'm just not THAT tech inclined. Please let me know if there's any info I can provide. Someone asking me questions might provide better results since I don't know where to even begin if I attempted to do this on my own! Thank you.