Not possible to create contacts in CRM when using Google Chrome and Microsoft Edge

This started happening a few weeks ago in Google Chrome Version 77.0.3865.120 (Official Build) (64-bit), and also Microsoft Edge.
It does work in Internet Explorer when you Create a contact within an Account.
Could you help?
We are using the Suite CRM Version 7.10.16, Sugar Version 6.5.25 (Build 344).
Is this a known issue?
I haven’t found any topic related to this on the forum.
Thanks for your help,
Kind regards,
Regine