What is error code 403?

[Thomas-and-Soviana0]

I get this error code 403 when I try to answer a guest....My answeris not posted...

[Clare0]

@Thomas-and-Soviana0 i found this on the internet.  See if it works for you:

http://www.techanges.com/fix-google-play-store-error-403/

[Stephanie2225]

como voce resolveu?

[Manuel4383]

My guest is telling me that he is getting this error code status 403.

is this something I did wrong?. I am getting other bookings no problem. 
Is it his side?