Can’t run mautic in hostgator shared host

Your software
My Mautic version is: latest one (just downloaded today)
My PHP version is: 7.3

My problem is:
I uploaded mautic folder in shared space of hostgator but I can’t reach out the installation process on the web although there is no problem with the domain
These errors are showing in the log:
" Parse error : syntax error, unexpected ‘$value’ (T_VARIABLE) in /home3/monicateder/cas-supply.info/mautic/vendor/aws/aws-sdk-php/src/functions.php on line 36"

Steps I have tried to fix the problem:
Called hostgator’s support service and they said we don’t support such technical issues you must ask from mautic support team.

Please advice

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