@brad, I am sure that you have made a mistake somewhere. Please try https://pleysier.com.au/about and compare the source code with that of the (so-called) working copy of http://kopar.workbcpg.ca/about.
Make sure that the links in the navbar look similar to
<div class="collapse navbar-collapse justify-content-end" id="navbar1_collapse">
<div class="navbar-nav">
<a class="nav-item nav-link active" href="./">Home</a>
<a class="nav-item nav-link" href="./about">About</a>
<a class="nav-item nav-link" href="./services">Services</a>
<a class="nav-item nav-link" href="./contact">Contact</a>
</div>
</div>
and the routing in .htaccess similar to
Wappler routing
RewriteEngine On
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^/?(?:/)?$ index.php [QSA,NC,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^/?(?:/)?$ index.php [QSA,NC,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^/?about(?:/)?$ index.php [QSA,NC,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^/?services(?:/)?$ index.php [QSA,NC,L]
RewriteCond %{REQUEST_FILENAME} !-f
RewriteRule ^/?contact(?:/)?$ index.php [QSA,NC,L]
End Wappler routing