First of all, to launch the profiling of a first-party data audience you must have access to the advertising account linked to the custom/lookalike audience you wish to analyze.
To see what access you already have and, if necessary, change it in order to launch the analysis, you must connect to the Meta Business account on which the custom/lookalike audiences are hosted.
Make sure that you have full control of the advertising account (manage ad account) or at least the advertiser role (manage campaigns).
👉 Get an overview on all access needed here