Not sure if this helps identify the fault at all, but I was having a similar problem. @C-Beats upon your suggestion I headed on over to the folder to check out if was set to read only, but it's set as per the below and that appears to be pretty normal for a lot of the folders for Windows 11 for me. Unchecking it just get's reverted to back to the same.
However, I realized I had starting using google drive to sync and back up my LaunchBox folder and the issue occurred after that. My solution was to delete the plugin folder completely, and then relaunch LaunchBox. LaunchBox recreated the plugin folder, then once in LaunchBox, it told me I needed to update the Dolphin plugin, restarted, and all seems good again.
No idea if it's the same issue but wanted to through it out there in case it helps anyone in anyway.
