Same issue as mentioned in your MantisBT: 0009074: [API REST] Tree error with the command 'Get requirement folders tree by projects' made on 2023-01-26 and still open ? I'm also a bit confuse where I need to make an issue..here in GitLab or in MantisBT ? (Although being a Reporter there, I don't see the option to create a bug ticket). --- I'm using Squash TM Community Edition 9.0.0.RELEASE Operating System = Windows 10 java version "21.0.5" 2024-10-15 LTS Java(TM) SE Runtime Environment (build 21.0.5+9-LTS-239) Java HotSpot(TM) 64-Bit Server VM (build 21.0.5+9-LTS-239, mixed mode, sharing) Database = PostgreSQL 17\`(PostgreSQL \[17.4 PostgreSQL 17.4 on x86_64-windows, compiled by msvc-19.42.34436, 64-bit\]) --- When making the API call 'GET /api/rest/latest/test-case-folders/tree/{projectId}' some child folders are reported back as a Root folder. The response JSON is incorrect, but Squash TM CE GUI shows the TestCase folders tree correctly. Also the DB contains the correct information for the folders tree. I'm currently writing a Migration program from TestRail to Squash TM CE for which I would like to use the Squash API calls as much as possible. Currently I am using as workaround direct SQL calls on my SquashTM ProgreSQL v17 DB.