SRFI 37 args-fold fails to be loaded due to bad search directory:

Exception in include/resolve: cannot find file in search paths with irritants ("srfi/%3a37/srfi-37-reference.scm" ("." "libs/thunderchez"))

Source of the error:

srfi/s37/args-fold.sls line 42:
 (include/resolve ("srfi" "%3a37") "srfi-37-reference.scm")

It seems like there's been a sloppy conversion from Surfage side and "%3a37" should have been "s37", making this change solves the problem.
Other SRFIs might have the same issue.