alvine36 If Windows Defender is running on your computer, and it should be since you don't have a third-party antivirus, please check Defender's Controlled Folder Access settings. Here's a guide:
https://learn.microsoft.com/cs-cz/defender-endpoint/controlled-folders
The Gallery is having issues right now, including these:
Gallery doesn't have results/Slow/No Connection | EA Forums - 13408128
[GALLERY] 'Timed Out'/Server error when saving lots (After Patch 1.124.63) | EA Forums - 13430124
[GALLERY] 'Content not installed' warning with all content owned | EA Forums - 12640662
If you think these fit your issues, feel free to post in those threads.
To be clear though, is your DLC loading while you play? As in, can you see the worlds and items from all the packs you own?
