Array.Empty

hello i am having some issue to run the grabber on ubuntu 16.04

Mono JIT compiler version 4.2.1

here is the log

[ ]
[ ] WebGrab+Plus/w MDB & REX Postprocess -- version V3.0.0.0 -- build 3
[ ]
[ ] Jan van Straaten
[ ] Francis De Paemeleere
[ ]
[ ] thanks to Paul Weterings and all the contributing users
[ ] --------------------------------------------------------------------------------
[ ]
[ ] Job started at 07/05/2020 20:56:29
[ Debug ]
[ Debug ] Running on: Unix 4.4.0.178
[ Debug ] Environment: 4.0.30319.17020
[ Debug ] Mono version: 4.2.1 (Debian 4.2.1.102+dfsg2-7ubuntu4)
[ Debug ]
[ Debug ] Loading timezone data
[ Debug ] Embedded timezones source: timezone.timezonesdata.txt
[ ] Job finished at 07/05/2020 20:56:29 done in 0s
[Critical]
Method 'Array.Empty' not found.
[Critical]
at WG.common.timezone.TimeZones+Database.LoadEmbeddedData (System.String resourcename) <0x4130a010 + 0x00287> in :0
at WG.common.timezone.TimeZones.constructor (System.String file, System.String f) <0x41309db0 + 0x000bf> in :0
at WG.common.timezone.TimeZones..ctor () <0x41308990 + 0x005c3> in :0
[Critical] Unhandled Exception
[Critical] For detailed info, see log file /root/.wg++/WebGrab++.log.txt
[Critical] Execution stopped

i looked up but most that i found were talking about windows version of this sort of problem :(