A group of Microsoft Products and technologies used for sharing and managing content, knowledge, and applications.
On the other hand, consider that your colleagues experience same issue too, it could be a tenant wide issue, I'm afraid general troubleshooting cannot fix it. It needs to be investigated and fixed by checking your SharePoint site from back end.
I am also getting this issue when accessing Sharepoint with Safari. It is not a tenant wide issue, as many users are having the same problem, and it started a couple of months ago. Please fix!