Redirect to home-page, when change language in Dspace 7.5

[Мухаметали Кусайынов]

Hello dear Dspace community! I can not solve one problem and I ask you for help!

In repository https://repository.kaznu.kz/home. 

I left only three languages. When changing to any of them, I change the language, but the redirect goes to the home-page. What could be the problem?

Here is my source code:

src/app/shared/lang-switch/lang-switch.component.html

<!-- <div ngbDropdown class="navbar-nav" *ngIf="moreThanOneLanguage" display="dynamic" placement="bottom-right">
  <a href="javascript:void(0);" role="button"
     [attr.aria-label]="'nav.language' |translate"
     [title]="'nav.language' | translate" class="px-1"
     (click)="$event.preventDefault()" data-toggle="dropdown" ngbDropdownToggle
     tabindex="0">
    <i class="fas fa-globe-asia fa-lg fa-fw"></i>
  </a>
  <ul ngbDropdownMenu class="dropdown-menu" [attr.aria-label]="'nav.language' |translate">
    <li class="dropdown-item" tabindex="0" #langSelect *ngFor="let lang of translate.getLangs()"
            (keyup.enter)="useLang(lang)"
            (click)="useLang(lang)"
            [class.active]="lang === translate.currentLang">
                {{ langLabel(lang) }}
    </li>
  </ul>
</div> -->

<div class="lang-block">
  <ul>
    <li class="lang-block-item">
      <a href="" (click)="useLang('en')" class="lang-link">eng</a>
    </li>
    <li class="lang-block-item">
      <a href="" (click)="useLang('kk')" class="lang-link">каз</a>
    </li>

    <li class="lang-block-item">

      <a href="" (click)="useLang('kk')" class="lang-link">каз</a>
    </li>

  </ul>  
</div>

Please suggest specific steps how to solve this problem please!
Thank you very much.
Sincerely, Mukhametali.