PLAYRDesign.run() problem

[nanu4github]

sorry again that when I run the PLAYRDesign and it just throw the error like error in evaluating the argument 'x' in selecting a method for function 'strsplit': subscript out of bounds in GUI and
Listening on http://127.0.0.1:5379 Warning in file(fp) : 'raw = FALSE' but '/home/hhl/R/' is not a regular file Warning in file(fp) : 'raw = FALSE' but '/home/hhl/R/' is not a regular file Warning: Error in h: error in evaluating the argument 'x' in selecting a method for function 'strsplit': subscript out of bounds 118: strsplit 117: parse_primer3_output 116: PLAYRDesign:::run_primer3 115: <reactive:primer3_data> [/home/hhl/R/x86_64-pc-linux-gnu-library/PLAYRDesign/shinyGUI/server.R#153] 99: primer3_data 98: <reactive:output$main_graph> [/home/hhl/R/x86_64-pc-linux-gnu-library/PLAYRDesign/shinyGUI/server.R#161] 82: output$main_graph 2: runApp 1: PLAYRDesign.run in console. Could you please help me to solve the problem, thanks a lot.