SBA 1.5.3 is not directly compatible with any ZC version other than ZC 1.5.1. There is a version of SBA (discussed multiple times over the last several pages) on github that includes the files for ZC 1.5.1 through 1.5.5. Installation should first be by the direct admin and includes directories, then by the folder specific to the ZC version.
Github location:
https://github.com/mc12345678/Stock_...butes_Combined.
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