I can confirm the same issue for us on both Linux and Windows versions of OpenLP. Previously I was able to login to CCLI within OpenLP to import CCLI lyrics but now the "Sign In" button remains greyed out. I had thought this might relate to some recent interaction we had with CCLI where they suggested we didn't have a license for a resource. This seems not to be the case however.
The link in OpenLP is to
https://profile.ccli.com/Account/Signin?appContext=SongSelect&returnUrl=https%3A%2F%2Fsongselect.ccli.com%2F
This link appears to be correct as it is also the one that works in Web browsers to login to SongSelect. This suggest to me that either the browser within OpenLP is no longer supported by CCLI or that there are some additional cookies or settings etc. now required to make the login page function correctly.
CCLI help have said to me that "_We have not made any changes to the churches access to Songselect either. I can suggest trying a different browser or devise to see if that works better. We recommend Google Chrome if that is helpful.
I'm afraid there are no plans to partner with Open LP, we have experienced issues before with customers being unable to access Songselect through this software and can only recommend that the church try a new software which is compatible. However you have made it clear that you do not wish to try anything else_."
On the face of it therefore, this may be an issue with the browser within OpenLP because the link is the same as works in Google Chrome to login.
It would be helpful if OpenLP support could look at the browser within the package and check its compatibility with CCLI SongSelect please.
For the moment I will use the Web CCLI resource to access CCLI songs and copy and paste these into OpenLP as required.