TrevorShardani Hi Trevor, I also encountered the same problem today after updating my firmware.
After playing around in the settings I noticed it had changed my default preferred data sim to my secondary sim that had mobile data switched off.
To fix, go into Network and Internet / SIMS. Then at the bottom go into ‘Data preference’ under ‘Default SIMS’ change this to your sim you want to use the data from.
Finally go into the sim card settings for your data sim and make sure mobile data is switched on.
Hope this helps, it worked for me.
All the best,
Lee