Mistake plotting

Hi! I am new in BrainStorm. I am trying to learn as fast as I can but...what´s mean all this? and how can I solve it?

BST> Warning: The positions of the following sensors are not set: E001 E002 E003 E004 E005 E006 E007 E008 E009 E010 E011 E012 E013 E014 E015 E016 E017 E018 E019 E020 E021 E022 E023 E024 E025 E026 E027 E028 E029 E030 E031 E032 E033 E034 E035 E036 E037 E038 E039 E040 E041 E042 E043 E044 E045 E046 E047 E048 E049 E050 E051 E052 E053 E054 E055 E056 E057 E058 E059 E060 E061 E062 E063 E064 E065 E066 E067 E068 E069 E070 E071 E072 E073 E074 E075 E076 E077 E078 E079 E080 E081 E082 E083 E084 E085 E086 E087 E088 E089 E090 E091 E092 E093 E094 E095 E096 E097 E098 E099 E100 E101 E102 E103 E104 E105 E106 E107 E108 E109 E110 E111 E112 E113 E114 E115 E116 E117 E118 E119 E120 E121 E122 E123 E124 E125 E126 E127 E128 
Error using bst_figures>CreateFigure
Nothing to display: All the "EEG" channels are marked as bad or do not have 3D positions.

Error in bst_figures (line 59)
eval(macro_method);

Error in view_topography (line 260)
    [hFig, iFig, isNewFig] = bst_figures('CreateFigure', iDS, FigureId, CreateMode, DataFile);

Error in bst_figures>ViewTopography (line 1593)
                view_topography(DataFile, Modalities{i}, '2DSensorCap', [], UseSmoothing);

Error in bst_figures (line 59)
eval(macro_method);

Error in figure_timeseries>@(h,ev)bst_figures('ViewTopography',hFig,1) (line 2291)
        jItem = gui_component('MenuItem', jPopup, [], 'View topography', IconLoader.ICON_TOPOGRAPHY, [], @(h,ev)bst_figures('ViewTopography', hFig, 1));

what´s mean all this? and how can I solve it?

It means that you need to set the position of the electrodes in your cap before trying to display a 2D or 3D topography of your EEG recordings.

If you are a new user of Brainstorm, I recommend you start by following the introduction tutorials (section "Get started"), at least until #19 included, and using the example dataset provided, not your own data.
https://neuroimage.usc.edu/brainstorm/Tutorials

If you are interested in processing EEG, read this tutorial before processing your own recordings:
https://neuroimage.usc.edu/brainstorm/Tutorials/Epilepsy

After all the reading, if you need help with specific issues that are not address in the documentation, please post your questions on this forum, including some background information and screen captures illustrating your problem.