I find that if you browse to a folder somewhere in your "My Documents" folder or similar folder, and you actually store a library there, you get an error about "B4A can't be installed in a folder with spaces" or something along those lines. If I get it again i'll post the exact test.
I fixed it by removing the optional library path, and copying the library (AdvancedCamera) to the actuall B4A install folder.
I fixed it by removing the optional library path, and copying the library (AdvancedCamera) to the actuall B4A install folder.