Running Qt version 5.15.5.
How about Bitcoin Core's version?
The latest Bitcoin Core version 26.0 uses QT v5.15.10.
Anyone know why it's not able to use the wallet?
I'm unable to reproduce this in v26.0 with "
deprecatedrpc=create_bdb" to create a legacy wallet file.
The wallet loads and I'm able to import a watch-only address.
Try upgrading to the latest version and/or try manually loading the wallet via
loadwallet "wallet_name" command.
See if it'll actually load without any error, if not, there may be something wrong with the wallet.dat file or the way it's loaded. (
more info on that may help)