When using Velixo with Acumatica 2020 R2 or higher, you can see zero or incorrect values in certain Asset and/or Liability accounts.
Acumatica 2020 R2 introduced a (behind-the-scenes) change in how financial periods are formatted
Use a version of Velixo which supports the version of your ERP.
See the list of compatible versions.
The latest version of Velixo can be downloaded here.