Microsoft Teams: We can't connect you: Error HTTP 400

HardcoreGR 

Hi,
I'm also getting the same problem since a few days ago (2 or 3 days not more).
Both Teams apps (desktop and web browser) started to show that same “ERROR HTTP 400” message every time I try to acccess to my Micrososft/Teams free account, as usual, with my own company email address (based on the corporative domain - Ex: mailto:myname@MYcompany-domain.com).

**Note1: I signed up my free account based on the “for work” option – not “for school” neither “for friends and family”).
**Note2: Due to my professional profile I also provide services to another company, that sign up me on another Microsoft/Teams account, an Microsoft 365 Enterprise paid version – Ex: myname@company-ABC-domain.com – which I usualy access through another browser.

At this moment I can’t access my own company (myname@MYcompany-domain.com) free Teams account, and from what I remember I don't think I had made any changes to it.
As a bypass to this issue, today I was forced to sign up a new Teams free “for work” account based on general email in my company – Ex: info@MYcompany.com – and so far it’s working fine on Windows desktop app.
Has anyone had a similar problem and that can help to solve these kind of unusual challenge?
Thanks.
José