Backup exex is unable to communicate with LTO autoloader.

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Hi all.

Server 2019 OS (Updated)
HP P212 HBA (None Raid) Single MSL2024 connected via external connector, nothing via the internal.
HP LTO5 SAS Drive

I've hit a small issue in that Backup Exec can't communicate with my HP Autoloader. Fresh install of Windows and BE up to latest version shows this in the adamm.log

**************************** LOG FILE*************************

[05764] 01/12/20 16:47:39.276 [StorageManager::RemoveUnusedLocalDisksFromDB] Results:
0 non-present unconfigured local disks were deleted
0 local disk parent objects with no local disks were deleted
[07068] 01/12/20 16:47:46.228 DeviceIo: Discover: serialize mode_sense FAILED, lib=(0,5,0), serial="MXA050Z3WP"
[07068] 01/12/20 16:47:46.260 DeviceIo Discovery - end
[07068] 01/12/20 16:47:46.260 DeviceIo Devices:
Scsi Address
Prt :Bus :Tar :Lun Attributes
------------------- -------------------------------------------------------------------------------
0003:0000:0004:0000 DeviceIo[01]: "HP Ultrium 5-SCSI HUJ7439GCF", Cert=Y, "\\.\Tape2147483646"
0003:0000:0005:0000 DeviceIo[02]: "HP MSL G3 Series MXA050Z3WP", Cert=N, "\\.\Changer0"
------------------- -------------------------------------------------------------------------------
[07068] 01/12/20 16:47:46.260 PnP Device Paths:
Scsi Address
Prt :Bus :Tar :Lun Device Path
----------------------------------- ---------------------------------------------------------------
00000003:00000000:00000004:00000000 \\?\scsi#sequential&ven_hp&prod_ultrium_5-scsi#7&74514f4&0&000400#{53f5630b-b6bf-11d0-94f2-00a0c91efb8b}
----------------------------------- ---------------------------------------------------------------
[07068] 01/12/20 16:47:46.260 Read Device Inquiries - start
[07068] 01/12/20 16:47:46.276 Backup Exec was unable to initialize and communicate with the device [HP MSL G3 Series 6.10] (The system cannot find the path specified.). Click the link below for more information on how to diagnose the problem.

**************************** LOG FILE END*************************

Windows can see the autoloader and tape drive just fine.
If I leave BE discovering services for long enough, I get this in the adamm.log and then it shows up as "online" but it doesn't work as an endpoint.

**************************** LOG FILE *************************

0003:0000:0004:0000 Device Name "\\.\Tape2147483646"
Secondary Name "\\?\scsi#sequential&ven_hp&prod_ultrium_5-scsi#7&74514f4&0&000400#{53f5630b-b6bf-11d0-94f2-00a0c91efb8b}"
Primary Inquiry "HP Ultrium 5-SCSI Z6MW"
Serial Number "HP Ultrium 5-SCSI HUJ7439GCF"
Device Flags UMD, SCSI, SN(TYPE 0)
Device State 3, Online
Device IDs 1050, {011D99CC-5C32-417E-9A50-8E951DD0CA8F}
Device Name "Tape drive 0001"
Device Type 134283265, "LTO 64K (64K,10,0,E,HU)"
Device Features 0x005BFA7F: PB,SFB,SRB,WFM,SFF,SRM,PEOD,EL,LU,E,SBS,DC,SDC,TA,HU,RR,W,EN
Device Element 0, 0
Device Block Limits 512 min, 65536 max
Device Hard Errors 0 write, 0 read
Device Soft Errors 0 write, 0 read
0003:0000:0005:0000 Device Name "\\.\Changer0"
Primary Inquiry "HP MSL G3 Series 6.10"
Serial Number "HP MSL G3 Series MXA050Z3WP"
Device Flags UMD, SN(TYPE 0)
Device State 3, Online
Device IDs 1052, {F0F6BDE3-5E47-4517-9E9D-57967B73A29E}
Device Name "Robotic library 0001"
Device Type 2131755008, "CHANGER FS=1"
Device Features 0x00026000: RMP,RRD,SMCE
1st Slot Number 1
Number Of Slots 0
Portal Slots 0
Import/Export Manual
Drives 0
0003:0000:0005:0000 Device Name "\\.\Changer0"
Primary Inquiry "HP MSL G3 Series 6.10"
Serial Number "HP MSL G3 Series MXA050Z3WP"
Device Flags UMD, SN(TYPE 0)
Device State 3, Online
Device IDs 1052, {F0F6BDE3-5E47-4517-9E9D-57967B73A29E}
Device Name "Robotic library 0001"
Device Type 2131755008, "CHANGER FS=1"
Device Features 0x00026000: RMP,RRD,SMCE
1st Slot Number 1
Number Of Slots 0
Portal Slots 0
Import/Export Manual
Drives 0

**************************** LOG FILE END*************************

Any advice?