Plugin causing re direct issues

We are trying to book several appointments for our booking page on our site via WordPress; however, every time we save anything in the plugin, it redirects us to the "install WordPress" page. This has happened about 20 times since yesterday, and i have already had i power assist several times, and their final solution was to reach out to you guys to see how to make this redirected error stop.
We are also not able to book our 1:45 p.m. and 3:45 p.m. appointments, as the time slots for both do NOT even exist on the drop down list when scheduling the appt.
Please fix as soon as possible. Thank you.