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Environment details?
Version of osTicket?

vero after installing osTicket using the QuickInstall One-Click install option in cPanel

We do not recommend using install services for osTicket. We do not know what they do to make things work, and it could cause issues.

vero Please advise on what my issue is?

You did not provide us with enough information to really know where to look or what to recommend.

vero Also, if there is a way to install 1.10 v on my WordPress site.

There is a 3rd party Wordpress osTicket bridge plugin
https://wordpress.org/plugins/osticket-wp-bridge/