Installing trial 9.7 php 7.4 - issues

unzipped and created a scriptcase directory on my hosting account
url: www.tshpro1.com/scriptcase
set permissions
this is the error i get accessing
Fatal error : Uncaught Error: Call to undefined function _setlocale() in H:\root\home\mhamlett-002\www\tshpro1\scriptcase\devel\lib\php\languages.inc.php:45 Stack trace: #0 H:\root\home\mhamlett-002\www\tshpro1\scriptcase\devel\lib\php\base_ini.inc.php(452): startLangs() #1 H:\root\home\mhamlett-002\www\tshpro1\scriptcase\devel\iface\login.php(25): unknown() #2 {main} thrown in H:\root\home\mhamlett-002\www\tshpro1\scriptcase\devel\lib\php\languages.inc.php on line 45

I Think SC is not compatible with php 7.4

It isn’t, but it’s not that hard to make it work as the incompatibilities are not that big, at least when you use the basic functionality. Looking at the message I would guess that there is something else going on as _setlocale() is not depending on any php version, but an internal SC function. It looks like a corrupt upload to me.