Starting from MIT/GNU Scheme Release 9.2,
they has added an awesome fix to make load no longer work
for file path who is prefixed "./"
If you spot error messages like the following one:
; Loading "./something.scm"...
;The object here, passed as an argument to open-input-string, is not a string.
;To continue, call RESTART with an option number:
; (RESTART 1) => Return to read-eval-print level 1.
Please try to remove the leading "./"
(e.g. change (load "./something.scm")
to (load "something.scm")) and try again.