letsyncrypt.js cryptAddPrivateKey() error

Running jsexec letsyncrypt returns the following error:

Command line: jsexec letsyncrypt

JSexec v3.18c-Linux master/d7cf7c577 - Execute Synchronet JavaScript Module
Compiled Feb 27 2021 21:57:33 with GCC 7.5.0

Loading configuration files from /sbbs/ctrl/
JavaScript-C 1.8.5 2011-03-31
JavaScript: Creating runtime: 8388608 bytes

Reading script from /sbbs/exec/letsyncrypt.js
/sbbs/exec/letsyncrypt.js compiled in 0.00 seconds
!JavaScript  /sbbs/exec/letsyncrypt.js line 270: Error: Error -44 calling cryptAddPrivateKey()

/sbbs/exec/letsyncrypt.js executed in 0.29 seconds
!Module (letsyncrypt) set exit_code: 1

I have attached the letsyncrypt.js (should be latest version).

letsyncrypt.js