If you find that you are unable to manually add a customer booking into your simpleERB diary or grid view, it may be down to a setting.
Here are a list of settings this could be related too -
Check what days of the week and times your restaurant is open at - https://app.simpleerb.com/restaurant/setup/simple/opentimes.aspx
Check what days you might have set to be closed on at -https://app.simpleerb.com/restaurant/setup/advanced/closeddates.aspx
Check what days you might be partially closed on at - https://app.simpleerb.com/restaurant/setup/advanced/partialopen.aspx
Check that your table layout and restaurant areas are set up correctly to take bookings and that tables have not been missed -
https://app.simpleerb.com/restaurant/setup/simple/tableadmin.aspx
If you only have one restaurant area to take bookings, always make sure the cover box is left bank -
https://app.simpleerb.com/restaurant/setup/simple/areas.aspx
Check your max covers per timeslot is adequate at
.https://app.simpleerb.com/restaurant/setup/simple/numberofcovers.aspx
Check your max covers for a particular time at https://app.simpleerb.com/restaurant/setup/advanced/maxcovers/
Check any areas you might have closed at -https://app.simpleerb.com/restaurant/setup/advanced/closedareas.aspx
Check that your smallest largest bookings at https://app.simpleerb.com/restaurant/setup/advanced/SmallesLargest.aspx
Check any tables you might have closed off to bookings in your table plan at
https://app.simpleerb.com/restaurant/setup/advanced/closedtables.aspx
Check that you don't have a 'partial open day's' setting edit listed with open/close times as 00:00 as this will close out those days.
Check that you have not added an override table turn time set to 'no time' as this will make all the bookings added take up the entire booking time slots until the last booking time.
Also remember if your system is unable to take a larger booking, make sure you have set up table joins at -
If you find you can only make 'manager bookings' check that your table turn time is not conflicting with your restaurant opening times -