Viber call does not work over wifi

[agacrasit]

Model: ZS620KL
RAM: 6G
Firmware/APP Version: WW_ZS620KL_90.10.138.181_20190202
Frequency of Occurrence: Every Calls
Rooted: No
APP Name: Viber

When I use over wifi, I can connect viber server but can not use calls. Over mobile data it works.

[ServiceE_Asus]

Hi agacrasit , Good day. I can make a call via Viber over WiFi. Please kindly click the mobile manager > data usage > control app data usage> WiFi> Viber > enable the option. If this problem still appears, please clear storage and cache on both Viber and mobile manager app. Thank you