Testcafe: Content of the iframe to which you are switching did not load

Testcafe v 1.9.4 When run test locally everything ok Wneh run via GitLab:

1) Content of the iframe to which you are switching did not load.
      Browser: Chrome 86.0.4240.111 / Linux 0.0
      
         119 |
         120 |
         121 |        await t.expect(this.cke1.exists).ok({timeout:60000})
         122 |        await
      t.expect(this.cke1.visible).ok({timeout:60000})
         123 |
       > 124 |        await t.switchToIframe(this.cke1);

I add : await t.eval(() => location.reload(true)); But it is not helpful This issue appeared around one week ago. Before it was ok too. Code did not change long time What could be the reason?