Fix innerText still being undefined in ssr mode

Author: alexandrevryghem

src/app/shared/log-in/log-in.component.html

@@ -1,7 +1,7 @@
 <ds-themed-loading *ngIf="(loading | async) || (isAuthenticated | async)" class="m-5"></ds-themed-loading>
 <div *ngIf="!(loading | async) && !(isAuthenticated | async)" class="px-4 py-3 mx-auto login-container">
   <ng-container *ngFor="let authMethod of getOrderedAuthMethods(authMethods | async); let last = last">
-    <div [class.d-none]="contentRef.innerText.trim().length === 0">
+    <div [class.d-none]="contentRef.innerText?.trim().length === 0">
       <div #contentRef>
         <ds-log-in-container [authMethod]="authMethod" [isStandalonePage]="isStandalonePage"></ds-log-in-container>
       </div>