BG will be because its linked to a storage drive that locks files... i'd check to see if the Documents for BG1/2 are in Onedrive?

BG3 already exists = you do indeed have two copies of the game [or you have two accounts?]... there are only 6 days remaining until full build goes live... personally i'd uninstall BG3 and physically remove the two BG3 folders from your system, then either install the EA build again or just wait the week but to a fresh location so i know the old messed up files are fully gone
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Luke Skywalker: I don't, I don't believe it.
Yoda: That is why you failed.