When creating a project I get the following error
When you say you tried updating the timezones data, where and how did you update that? Usually the fix for the error you describe is to set the CorporateTimeZone variable.
From there, you should be in good shape. In most installations, the CorporateTimeZone variable doesn't exist at all to start and needs to be created, hence my assumption that wasn't what you updated. Let us know if that helps!
Managed to create a project, but now when trying to save I get an error
Conversion failed when converting the nvarchar value ' Error occured during execution of ConvertToLocal function: Specified timezone 'South Africa Standard Time ' is not supported. ' to data type int. in SQL: exec [UPDATE_SCHEDULE] '5C00C24331E34605B1514B625B36B561','South Africa Standard Time ','0'