Corrected false checks to null.

module/VuFind/src/VuFind/Role/PermissionProvider/ServerParam.php

@@ -144,7 +144,7 @@ class ServerParam implements PermissionProviderInterface,
 
         // server param values to check
         $serverParamString = $this->request->getServer()->get($serverParamName);
-        if ($serverParamString === false) {
+        if ($serverParamString === null) {
             // check fails if server param is missing
             return false;
         }

module/VuFind/src/VuFind/Role/PermissionProvider/Shibboleth.php

@@ -74,7 +74,7 @@ class Shibboleth extends ServerParam
      */
     public function getPermissions($options)
     {
-        if ($this->request->getServer()->get('Shib-Identity-Provider') === false) {
+        if ($this->request->getServer()->get('Shib-Identity-Provider') === null) {
             $this->logWarning('getPermissions: Shibboleth server params missing');
 
             return [];