Can't open data file

[LeLyfa]

I can't decode any station, I then connected to the RP via SSH and started decode-wspr-parallel.sh in /opt/redpitaya/www/apps/sdr_wspr getting the following result:

root@rp-f06f2e:/opt/redpitaya/www/apps/sdr_wspr# ./decode-wspr-parallel.sh
Wed Mar 27 20:26:17 UTC 2019
Recording ...
No 'corr' setting in configuration file.
Decoding ...
Academic tradition requires you to cite works you base your article on.
When using programs that use GNU Parallel to process data for publication
please cite: O. Tange (2011): GNU Parallel - The Command-Line Power Tool,
;login: The USENIX Magazine, February 2011:42-47.
This helps funding further development; AND IT WON'T COST YOU A CENT.
If you pay 10000 EUR you should feel free to use GNU Parallel without citing.
To silence this citation notice: run 'parallel --citation'.
Cannot open data file 'wspr_*_190327_2026.c2'

Thank you for help & best 73s!