Spell information such as duration, casting time and components not showing up in the character builder.

Check VPNs or Extensions.

Works fine for me using Firefox, Chrome, Chromium, Opera GX, and Safari.

Hasn't been working for me either.  I use Chrome on the computer, but I've only had the issue for about a week. The spell description is there, but the casting time, range, etc, like Tristiis said, is in a white font like it should be in dark mode or something.  I'm able to highlight the text and see it that way.

Tristiis, I think I just figured it out.  I had "underdark" mode on my character sheet.  When I turned it off, the text for the spells shows up as normal.  It must be some bug that just recently came up because I've only had that issue for about a week.  I've always had dark mode on.

When adding spells through the character builder using the spell Find Familar as an example, the tag summoning is shown but the tag ritual is missing. It would be handy if the ritual tag was also displayed in the tags section.

Using Opera GX without issue for over a year until recently. The right half of my character sheet has been getting cut off for about 2 months now. I can't see roll numbers in game log without moving the window to the left side of the screen. This wouldn't be an issue but when I switch the window to the left side, it results in the sheet bugging out and not allowing me to click on certain things without refreshing the page. Really hope DnD beyond addresses this soon. GX is easily one of the best browsers for a gaming PC due to the ability to limit resources and all around is an enjoyable product but using the browser and DnD beyond has become a pain. 

Quote from Shug18 >>

Using Opera GX without issue for over a year until recently. The right half of my character sheet has been getting cut off for about 2 months now. I can't see roll numbers in game log without moving the window to the left side of the screen. This wouldn't be an issue but when I switch the window to the left side, it results in the sheet bugging out and not allowing me to click on certain things without refreshing the page. Really hope DnD beyond addresses this soon. GX is easily one of the best browsers for a gaming PC due to the ability to limit resources and all around is an enjoyable product but using the browser and DnD beyond has become a pain. 

 
This is a you thing not a Opera GX thing or D&D Beyond thing.

I'm using Opera GX too and not experiencing issues. 

I would suggest checking Zoom level, extensions and VPNs.