My Service Customers are getting Bad/ damaged link

[Tathagata Ghosh]

I'm adding people from my organization as customer to our HR service desk, but they are receiving a mail with expired link. And an error message is coming "Something Bad happened' 

[Angélica Luz]

Hello @Tathagata Ghosh,

Welcome to Atlassian Community!

Just for a better understanding of the issue, I would like to know if they are facing this issue when they click on the link of the invite or after they login into the portal.

Can you please check if they face the same issue if they go directly to https://xxxxxx.atlassian.net/servicedesk/customer/portals?

I tested on my local site and wasn't able to replicate the issue. 

Is it happening to a Classic or Next-gen project?

Is it happening when inviting any customer?

Regards,
Angélica