There is more to look into as just retirable jQuery libraries.
F-Grade here and recommendations:
https://observatory.mozilla.org/analyze.html?host=www.onlinechatcenters.com
Re: https://aw-snap.info/file-viewer/?protocol=secure&tgt=www.onlinechatcenters.com&ref_sel=GSP2&ua_sel=ff&fs=1

Wait for an avast team member to give the final verdict.
We are just volunteers with relevant knowledge, as only avast team members will unblock.

Ip and wXw.onlinechatcenters.com/chat/?action=prechat was last flagged on 217-05-10,
given secure here: https://reports.adguard.com/en/onlinechatcenters.com/report.html

polonus (volunteer website security analyst and website error-hunter)