Jelly Error

Traceback (most recent call last):
  File "/root/.local/bin/jelly", line 74, in <module>
    raise SystemExit(main(code, args, end))
  File "/root/.local/lib/python3.10/site-packages/jelly/__init__.py", line 10, in main
    output(jelly_eval(code, args[:2]), end)
  File "/root/.local/lib/python3.10/site-packages/jelly/interpreter.py", line 422, in jelly_eval
    return variadic_chain(parse_code(code)[-1] if code else '', arguments)
  File "/root/.local/lib/python3.10/site-packages/jelly/interpreter.py", line 1247, in variadic_chain
    return niladic_chain(chain)
  File "/root/.local/lib/python3.10/site-packages/jelly/interpreter.py", line 684, in niladic_chain
    return monadic_chain(chain[1:], chain[0].call())
  File "/root/.local/lib/python3.10/site-packages/jelly/interpreter.py", line 604, in monadic_chain
    ret = dyadic_link(chain[0], (ret, monadic_link(chain[1], arg)))
  File "/root/.local/lib/python3.10/site-packages/jelly/interpreter.py", line 641, in monadic_link
    return [monadic_link(link, z, conv = conv) for z in arg]
  File "/root/.local/lib/python3.10/site-packages/jelly/interpreter.py", line 641, in <listcomp>
    return [monadic_link(link, z, conv = conv) for z in arg]
  File "/root/.local/lib/python3.10/site-packages/jelly/interpreter.py", line 637, in monadic_link
    return link.call(arg)
  File "/root/.local/lib/python3.10/site-packages/jelly/interpreter.py", line 1795, in <lambda>
    call = lambda z: jelly_eval(''.join(map(str, z)), [])
  File "/root/.local/lib/python3.10/site-packages/jelly/interpreter.py", line 422, in jelly_eval
    return variadic_chain(parse_code(code)[-1] if code else '', arguments)
  File "/root/.local/lib/python3.10/site-packages/jelly/interpreter.py", line 1247, in variadic_chain
    return niladic_chain(chain)
  File "/root/.local/lib/python3.10/site-packages/jelly/interpreter.py", line 684, in niladic_chain
    return monadic_chain(chain[1:], chain[0].call())
  File "/root/.local/lib/python3.10/site-packages/jelly/interpreter.py", line 622, in monadic_chain
    ret = monadic_link(chain[0], ret)
  File "/root/.local/lib/python3.10/site-packages/jelly/interpreter.py", line 637, in monadic_link
    return link.call(arg)
  File "/root/.local/lib/python3.10/site-packages/jelly/interpreter.py", line 2988, in <lambda>
    call = lambda z: dyadic_link(links[0], (z, z))
  File "/root/.local/lib/python3.10/site-packages/jelly/interpreter.py", line 211, in dyadic_link
    return [dyadic_link(link, (x, rarg)) for x in larg]
  File "/root/.local/lib/python3.10/site-packages/jelly/interpreter.py", line 211, in <listcomp>
    return [dyadic_link(link, (x, rarg)) for x in larg]
  File "/root/.local/lib/python3.10/site-packages/jelly/interpreter.py", line 202, in dyadic_link
    return link.call(larg, rarg)
  File "/root/.local/lib/python3.10/site-packages/jelly/interpreter.py", line 27, in at_index
    low_index = math.floor(index) - 1
TypeError: must be real number, not str