Hi, I am using algotutor on Buster with my home as working directory and do not experience the reported issue. algotutor is 0.8.6-2. Here is the terminal output:
$ algotutor Use of uninitialized value $opts{"a"} in string eq at /usr/share/algotutor/algotutor line 34. Use of uninitialized value $opts{"a"} in string eq at /usr/share/algotutor/algotutor line 34. Use of uninitialized value $opts{"a"} in string eq at /usr/share/algotutor/algotutor line 34. need exactly one data file. Example: algotutor -a bst /usr/share/algotutor/data/countries.gr $ algotutor -a bst /usr/share/algotutor/data/countries.gr total marks: 184 seeking to step 0... <Now, the window opens, I can press step forward, step backward, etc.>