OK, looks good.
Indeed it does not see the realtime.txt and the realtimegauges.txt.
Those two files are uploaded by CumulusMX. The location is determined by the Web/FTP site settings in CMX. That is where the directory is defined. Normally that would be the website root. If you have only one website - i.e. the CumulusUtils generated site - you would give the /CMX/ directory in CMX as the location to dump the realtime (and graphics JSON) files.
However if you have more websites (e.g. you have already the original CMX standard website) and you want to keep both, you have to tell CumulusUtils where it can find the realtime files. For this purpose in the cumulusutils.ini file you will find in section [Website] the parameter
That is where you enter the location of the realtime files relative to the website root from an FTP view. This may differ for each provider. So it can be
But it might just as well be anywhere as long as it is on the same domain (see also the manual).
Good Luck