serastores

i have error in login by gmail
Server Error
403
Forbidden
what can i do to solve it with out give permission to other … in firewall

after install plugin 404 solution performance score is calculated in speed page is slow this screen shoot for when plugin it activated https://i.imgur.com/ixp0n1O.png
and this screen shot when deactivated https://i.imgur.com/2Mstlsu.png

after install 404 solution