I imported ALINE into an existing project and it caused the following error:
Library\PackageCache\com.unity.burst@1.7.2\Runtime\Editor\BurstLoader.cs(592,17): error CS0104: ‘Progress’ is an ambiguous reference between ‘System.Progress’ and ‘UnityEditor.Progress’
I know it doesn’t seem related as the error message does not refer to a file in the ALINE package, but the project works without ALINE installed and gives about 9 of these exceptions when installed.
I cannot replicate this locally, so it’s likely some combination of your unity version, .net framework backend and burst package version. Likely changing one of those will be a workaround, but I’m afraid I don’t know which.