I have been using Centovacast V3.2.10 software since 2017 and decided to upgrade it to V3.2.12. Hoping that the new version is stable. After completing the upgrade, the accounts that has a AutoDJ has stopped working.

When I start the server, it returns an error:
At ../hoperadi/etc/liquidsoap/centovacast.liq,
line 131, char 8-9:this value has typeref(string) (inferred at ../hoperadi/etc/liquidsoap/centovacast.liq, line 128, char 9-14)but
it should be a subtype of (the type of the value at ../hoperadi/etc/liquidsoap/centovacast.liq, line 131, char 8-26)ref((default:_)->_)
Log has not been created, which may indicate a permissions problem or an inability to run the external application. Consult the Centova Cast
knowledge base.
------------------------------------------------------------------------------
Additional error on all of my centova server
Last 8 lines from the relevant log file:
===============================================================================
[2020-03-21 22:01:12] INFO thread/ lock abort set to 0
[2020-03-21 22:01:12] INFO logging/recheck_log_file Using global log file var/log//access.log
[2020-03-21 22:01:12] INFO logging/recheck_log_file Using global log file var/log//playlist.log
[2020-03-21 22:01:12] INFO main/server_proc_init Icecast 2.4.0-kh10 server reading configuration from ../amfmphil/etc/server.conf
[2020-03-21 22:01:12] INFO connection/get_ssl_certificate No SSL capability on any configured ports
[2020-03-21 22:01:12] EROR connection/connection_setup_sockets Could not create listener socket on port 8854 bind 209.126.105.44
[2020-03-21 22:01:12] EROR connection/connection_setup_sockets unable to setup all listening sockets
[2020-03-21 22:01:12] EROR main/fatal_error Server startup failed. Exiting

My question is,
1. How to fix this issue?
2. Is it possible to undo the upgrade?

Any help would be appreciated.
Note:

I'm many months late on this reply but I hope this helps someone in the future.  We were getting a similar issue.  We are using a Shoutcast V2 mount point using Liquidsoap as the AutoDJ.   We migrated to a new server and upgraded to Centova v3.2.12.  When we started the mount point it would error out, not save anything in the logs and would just say it couldn't start liquidsoap.

The error message:

At ../ss_hitline/etc/liquidsoap/centovacast.liq, line 131, char 8-9:this value has typeref(string) (inferred at ../ss_hitline/etc/liquidsoap/centovacast.liq, line 128, char 9-14)but it should be a subtype of (the type of the value at ../ss_hitline/etc/liquidsoap/centovacast.liq, line 131, char 8-26)ref((default:_)->_)

Log has not been created, which may indicate a permissions problem or
an inability to run the external application.  Consult the Centova Cast
knowledge base.

This is how I fixed it:

Log in to the account.
Click the "Mount Points" tab.
Click the "/stream" entry in the mount point list.
Click the "AutoDJ settings" tab.

AutoDJ settings are:
Use autoDJ: Yes
Public: No
Audio encoder: MP3
Encoding type: CBR
Bit rate: 128kbps
Channels: stereo
Sample rate: 44100 Hz

Click the "Advanced settings" section
Set "Stereo mode" to "Default"

When we changed "Stereo Mode" from "Stereo" to "Default" the mount point started right up.  Hope this helps someone else.