I have received an error message, whe I choise functional tools: slice viewer (I have matlab 2019b). I get the following error:

Error using strfind
PATTERN must be a string scalar or character vector.

Error in contains (line 36)
tf = ~cellfun(@isempty, strfind(s, pattern));
Error in matlab.ui.internal.prepareFigureFor
Error in rotate3d (line 171)
matlab.ui.internal.prepareFigureFor(f, mfilename('fullpath'));
Error in conn_slice_display (line 451)
set(rotate3d,'ActionPostCallback',{@conn_slice_display_refresh,'position'});
Error in conn (line 1765)
elseif val==3, fh=conn_slice_display(CONN_x.Setup.structural{nsub}{nsesstemp(1)}{1},temp1,[],[nan 0],sprintf('dataset %d',nset));
CONN18.b
SPM12 + DEM FieldMap MEEGtools
Matlab v.2019b
project: CONN18.b
storage: 388.3Gb available
spm @ C:\tools\spm
conn @ C:\tools\conn

Thanks